State of Iowa v. Stacy Marie Diveley

IN THE COURT OF APPEALS OF IOWA

No. 24-1110
Filed June 18, 2025

STATE OF IOWA,
Plaintiff-Appellee,

vs.

STACY MARIE DIVELEY,
Defendant-Appellant.
________________________________________________________________

Appeal from the Iowa District Court for Benton County, Ian K. Thornhill,

Judge.

A defendant appeals her convictions for child endangerment. AFFIRMED.

Des C. Leehey, Cedar Rapids, for appellant.

Brenna Bird, Attorney General, and Sheryl Soich, Assistant Attorney

General, for appellee.

Considered without oral argument by Schumacher, P.J., and Buller and

Sandy, JJ.
2

SCHUMACHER, Presiding Judge.

A jury convicted Stacy Diveley on six counts of child endangerment. She

appeals, specifically challenging the district court’s denial of her motion for mistrial.

On appeal, she raises two Brady challenges and one challenge under rule 5.403

of the Iowa Rules of Evidence. The State disputes error is preserved on these

issues. Upon review, we agree with the State as it relates to the Brady challenges.

And even if error is preserved on the rule 5.403 challenge, Diveley has waived this

issue on appeal. Accordingly, we affirm.

I. Background Facts and Proceedings

In 2011, Stacy began dating Jeff Diveley.1 At the time, Stacy’s daughter

A.D. was ten years old and her daughter I.D. was five years old. Stacy and Jeff

married in 2013, and Jeff later adopted both girls.

Within two years of the start of Stacy and Jeff’s relationship, Jeff began

sexually assaulting A.D. and I.D. Both girls reported the sexual assaults to Stacy.

At trial, A.D. recalled, “I told her the first time it happened, and . . . I think she said

she’d take care of it. But each consecutive time that I told her, she seemed to get

more impatient or frustrated.” As the sexual assaults escalated, A.D. stopped

telling Stacy every time the sexual abuse occurred because “at that point I told her

about so many instances of him inappropriately touching me that I didn’t think she’d

believe me or she’d say it was my fault.” I.D.’s experiences seeking help from

Stacy were equally stinging; I.D. testified that she “was terrified of Stacy” and that

she never reported the abuse even to doctors because I.D. believed Stacy “would

1 Because Stacy and Jeff Diveley share a last name, we use their first names for

clarity.
3

have been pissed and slapped me and called me a cunt, bitch, whore, slut, all of

those words.”

At times, Stacy sent text messages to Jeff, confronting him about the abuse.

Stacy took screenshots of these messages and sent them to A.D. In one message

to Jeff, submitted as evidence at trial, Stacy texted, “Let me make myself clear one

more time do not put your hands down their pants up their pants or anywhere

around their private areas. I don’t know why I need to keep telling you this . . . .”

According to Stacy, though, the texts were a ruse, designed with Jeff’s knowledge,

sent only to pacify A.D.—who Stacy characterized as “ha[ving] a tendency to

spiral.”

Stacy continued to fail her daughters. When I.D. was fifteen years-old, she

reported to a friend that Jeff vaginally penetrated her with his penis. I.D. also

reported the rape to Stacy, after which “[Stacy] said she would go talk to Jeff.”

Stacy then brought Jeff to see I.D., called I.D. a liar and a slut, and slapped her.

Jeff’s sexual abuse of A.D. continued even after A.D. left for college, when she

was forced home due to COVID-19. He continued to sexually abuse I.D. until

2022, when I.D. moved out of Stacy and Jeff’s home and in with extended family.

In June 2022, the Benton County Sheriff’s Office opened an investigation of

Jeff for sexual abuse of I.D.2 Deputy Laura Deaton served as the lead investigator

and interviewed Stacy during the investigation. Stacy told Deputy Deaton that “she

2 An earlier investigation was opened in October 2021 after I.D. reported the rape

to her friend, but the investigation was closed after I.D. told investigators the rape
was a dream. At trial, I.D. testified that Stacy instructed I.D. to tell investigators
the rape was only a dream. This conduct was the basis for Stacy’s witness
tampering charge.
4

was always on [Jeff’s] phone” and that she had looked through Jeff’s phone for

naked pictures of her daughters and pornography. Stacy alleged she found no

naked pictures but admitted she knew Jeff watched pornography on his phone.

In November 2022, the State charged Stacy by trial information with six

counts of child endangerment—for “knowingly act[ing] in a manner that created a

substantial risk to a child or minor’s physical, mental or emotional health, or safety

and/or . . . knowingly permit[ing] the continuing physical abuse or sexual abuse” of

A.D. and I.D.—and one count of witness tampering.

During trial, Deputy Deaton testified about cellphone extraction reports

produced from Stacy’s and Jeff’s phones. Specifically relevant to this appeal,

Deputy Deaton testified about three phrases discussed in the context of

“pornography URLs” discovered on Jeff’s phone. The State began a line of

questions about “pornography URLs.” Then the State asked, “can you give three

searches that are specific to this case of relevance?” Before Deputy Deaton

answered, Stacy objected:

DEFENSE: Objection, as to relevance of what she was
searching. I’m not sure how that’s applicable to this case.
COURT: Whose phone are we asking about here?
PROSECUTOR: Jeff’s phone.
COURT: And do we have an exhibit? Are you talking about
an exhibit?
PROSECUTOR: No, Your Honor. This is based on the cell
phone extraction, which was produced to the defense.
COURT: And you’re offering these for the truth of the matter
asserted?
PROSECUTOR: No, Your Honor.
COURT: What are you offering them for?
PROSECUTOR: Your Honor, we’re offering it because the
Defendant said that she was on the [sic] Jeff Diveley’s phone all the
time.
COURT: So you’re offering it for the limited purpose of her
having some knowledge. Is that what you’re offering it for?
5

PROSECUTOR: Yes, Your Honor.
COURT: All right. Then based upon that limited purpose, the
objection is overruled. The witness can answer the question. The
jury will hear the answer only for the limited purpose the Court just
stated. Go ahead.

The State resumed questioning Deputy Deaton:

PROSECUTOR: Were you able to find three of those
pornography URL addresses that you believed were relevant to your
investigation?
DEATON: Yes.
PROSECUTOR: Can you tell the jury those three addresses?
DEATON: Dad fucks teen daughters; daddy fucking me, part
one; daughter shows her pussy to dad.

After the close of the State’s evidence—which followed Deputy Deaton’s

testimony—Stacy made an oral motion for mistrial based on an alleged Brady

violation.3 The district court denied the motion, and the jury convicted Stacy on all

six child endangerment charges. The jury acquitted Stacy of the witness tampering

charge.

Stacy appeals, challenging the district court’s denial of her motion for

mistrial. She advances three grounds for her challenge. First, she argues the

admission of Deputy Deaton’s testimony about the three “URLs” referencing

incestual pornography were unfairly prejudicial and should have been excluded

under Iowa Rule of Evidence 5.403. Second, she contends the State

impermissibly suppressed the evidence of the three phrases during discovery,

3 See Brady v. Maryland, 373 U.S. 83, 87 (1963) (“[T]he suppression by the
prosecution of evidence favorable to an accused upon request violates due
process where the evidence is material either to guilt or to punishment, irrespective
of the good faith or bad faith of the prosecution.”).
6

amounting to a Brady violation. Third, she claims the disputed testimony was

perjured, also an alleged Brady violation.4

II. Brady Challenges

The State disputes that Stacy preserved error on her Brady challenges to

the district court’s denial of her mistrial motion. Specifically, the State argues Stacy

needed to make a motion for mistrial before the completion of Deputy Deaton’s

testimony to preserve error on her improper suppression and false testimony

grounds.

Generally, a party must make a motion for mistrial as soon as the basis for

the motion becomes apparent. State v. Gibb, 303 N.W.2d 673, 678 (Iowa 1981).

If the motion is based on “alleged errors committed by [the] trial court in the

introduction of evidence at trial,” error preservation requires timely and specific

objections. Id.

Stacy objected on relevancy grounds immediately after the State asked

Deputy Deaton a question eliciting testimony about the disputed phrases. Stacy

did not mention improper suppression, prosecutorial misconduct, false testimony,

perjury, or Brady. The State explained the questioning was “based on the cell

phone extraction, which was produced to the defense,” and that it was being

offered for the limited purpose of showing Stacy had “some knowledge.” Stacy did

not make any additional argument or request to be heard. The district court

overruled Stacy’s objection, and Deputy Deaton continued her testimony. Stacy

4 See State v. Todden, 364 N.W.2d 195, 198–99 (Iowa 1985).
7

did not object after Deputy Deaton told the jury the specific three phrases she found

in the cellphone extraction report.

On cross-examination, Stacy asked Deputy Deaton questions clarifying

where evidence of her discovery of those phrases might be found. Deputy Deaton

conceded she “did not include those specific URL’s in [her] report,” and that if she

notified anyone about the specific findings before trial, it would have been the

detective who first investigated Jeff for sexual abuse of I.D. and from whom Deputy

Deaton took over the investigation. When Stacy was afforded an opportunity to

perform recross examination, her questions focused solely on the foundation for

Deputy Deaton’s testimony about the phrases and whether Deputy Deaton

“provide[d] that to anybody.” After Stacy finished her recross-examination, the

State asked one-question on further redirect: “The cellphone extraction, was that

provided to defense in discovery?” Deputy Deaton replied, “Yes.”

The State closed its case-in-chief after Deputy Deaton’s examination

concluded, and Stacy orally submitted her motion for mistrial, “based on what

sounds to be a Brady violation.”

The State contends Stacy’s motion for mistrial was too late to preserve error

because Stacy waited to make the motion until after the completion of Deputy

Deaton’s testimony, after the State rested its case-in-chief, and after Stacy made

a motion for a judgment of acquittal. See, e.g., State v. Cornelius, 293 N.W.2d

267, 269 (Iowa 1980) (determining the defendant failed to preserve error when he

moved for mistrial after the State rested its case-in-chief because the “defendant

should have asked for a mistrial when the allegedly prejudicial question was

asked”); Gibb, 303 N.W.2d at 678 (finding error unpreserved on the defendant’s
8

argument that witness testimony violated a constitutional right when the defendant

did not assert that argument until his posttrial motion in arrest of judgment and

request for new trial). Based on Cornelius and Gibb, the State submits that Stacy

needed to move for a mistrial when she first became aware of the potential

issues—which, based on her questioning, reasonably appears to have occurred at

least during her initial cross examination.

Stacy did not respond to the State’s challenge to error preservation on either

the suppression issue or the perjury issue. Indeed, nowhere in her briefing does

she address the timeliness component of error preservation on motions for mistrial,

despite specifically acknowledging the State’s challenges in her reply brief. 5 And

without legal authority provided by Stacy to distinguish the present matter from

those authorities supporting the State’s position, to determine the authorities

provided by the State do not instruct our error preservation analysis here would

require us to take on a partisan role and advocate for error preservation on Stacy’s

behalf6—a role that we decline. See Inghram v. Dairyland Mut. Ins. Co., 215

5 We recognize that the questioning by counsel could possibly be sufficient for error

preservation. Cf., e.g., State v. Ware, 205 N.W.2d 700, 702–03 (Iowa 1973)
(finding a motion for mistrial was timely made despite defense counsel continuing
to cross-examine the witness whose testimony was in dispute when the continued
cross-examination was for the purpose of “ascertain[ing]” information relevant to
the defendant’s subsequent mistrial motion). But Diveley did not make this
argument, did not cite Ware, and did not attempt to distinguish her facts from the
State’s authorities.
6 We also recognize that the cases cited by the State in support of its error

preservation challenge are not substantively precise matches for the matters now
before us—neither Cornelius nor Gibb dealt with alleged Brady violations. See
generally Cornelius, 293 N.W.2d at 269; Gibb, 303 N.W.2d at 678. But the
procedural timelines in those cases align with the procedural timeline here so that,
if viewing the facts from an abstracted procedural standpoint, the State’s reliance
on Cornelius and Gibb is persuasive.
9

N.W.2d 239, 240 (Iowa 1974) (“To reach the merits of this case would require us

to assume a partisan role and undertake the appellant’s research and advocacy.

This role is one we refuse to assume.”).

Under these circumstances and under the authorities provided, we

determine Stacy failed to preserve error on both of her challenges based on

alleged Brady violations.

III. Relevance and Unfair Prejudice

The State also disputes Stacy preserved error on her rule 5.403 challenge.

There is no question that Stacy preserved error by objecting to relevancy. The

question is whether Stacy’s relevance objection was sufficient to preserve error on

her claim that “the URLs have no probative value and are unfairly prejudicial to

Mrs. Diveley.” See State v. Mulvany, 603 N.W.2d 630, 632 (Iowa Ct. App. 1999)

(“Prior case law does not clearly delineate when a simple relevancy objection is

sufficient to preserve a more specific argument on appellate review.”).

Even assuming error was preserved, other than stating “Iowa Rule of

Evidence 5.403 calls for the district court to exclude evidence that [sic] when the

probative value of that evidence is substantially outweighed by a danger of unfair

prejudice,” Stacy provides no legal authority to support her claim that based on

rule 5.403, the district court’s denial of her motion for mistrial was an error. She

merely argues the facts and voices her concerns that the phrases are

“inflammatory as gasoline” and the unfair prejudice is “maximal.” Without legal

authority supporting her contention, our analysis ends here.7 See Iowa R. App.

7 For the same reason, even if we were to assume error was preserved on Stacy’s

Brady challenges, her arguments lack legal authority beyond a bare recitation of
10

P. 6.903(2)(a)(8)(3) (“Failure to cite authority in support of an issue may be

deemed waiver of that issue.”).

IV. Conclusion

Stacy failed to preserve error on her Brady challenges. Assuming she

preserved error on her rule 5.403 challenge, her failure to provide supportive legal

authority has waived the issue. Accordingly, we affirm.

AFFIRMED.

the generally applicable rules in the opening paragraph of each issue. Stacy
provides no legal authority to support any claim that she satisfied the numerous
elements necessary to satisfy her burden on either of her two Brady challenges.
See DeSimone v. State, 803 N.W.2d 97, 103 (Iowa 2011) (recognizing three
elements of a Brady suppression analysis: suppression, favorability, and
materiality); Todden, 364 N.W.2d at 198–99 (identifying five “threshold”
“considerations” relevant to a Brady perjury analysis). Indeed, Diveley does not
argue how these “URLs” could have been favorable to her defense.