Clemente Javier Aguirre-Jarquin v. Robert Hemmert

Court of Appeals for the Eleventh Circuit·Decided November 4, 2025·No. 23-10811·Published

Opinion

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FOR PUBLICATION

In the

United States Court of Appeals For the Eleventh Circuit

No. 23-10811

CLEMENTE JAVIER AGUIRRE-JARQUIN, Plaintiff-Appellee-Cross Appellant, versus

SEMINOLE COUNTY, et al., Defendants,

ROBERT HEMMERT, in his individual capacity, Deputy Sheriff, JACQUELINE GROSSI, in her individual capacity, Crime Scene Analyst, DONNA BIRKS, in her individual capacity, Latent Print Examiner, Defendants-Appellants-Cross Appellees, SEMINOLE COUNTY SHERIFF, Defendant-Appellee.

2 Opinion of the Court 23-10811

Appeals from the United States District Court for the Middle District of Florida D.C. Docket No. 6:20-cv-00025-RBD-DCI

Before JORDAN, LAGOA, and TJOFLAT, Circuit Judges. TJOFLAT, Circuit Judge:

In 2006, a Florida court sentenced Clemente Javier Aguirre-

Jarquin to death for the grievous murders of his neighbors, Cheryl Williams and Carol Bareis. But as Aguirre languished on death row over the course of the next decade, the foundation of his convictions buckled. A 2007 investigation into the Seminole County Sheri ff’s Office Latent Print Unit revealed a pattern of misconduct that substantially undermined the positive identification of Aguirre as the source of latent prints on the murder weapon. Samantha Williams , the daughter and granddaughter of the victims, also admitted to her involvement in the murders. Post-conviction testing of blood evidence from the murders, most of which had never been tested, corroborated Samantha’s admissions and discredited Aguirre’s convictions. The Supreme Court of Florida ultimately ordered a new trial. And the State dropped all charges in 2018.

Aguirre, freed from death row, sued Donna Birks, the latent print examiner who investigated the prints on the murder weapon, Robert Hemmert, the lead homicide investigator, and Jacqueline Grossi, the lead crime scene investigator. He also sued the Seminole County Sheriff in his official capacity. Aguirre brought multiple claims under 42 U.S.C. § 1983 relating to the latent print

23-10811 Opinion of the Court 3

examination, the investigation, and his prosecution. He also claimed under Florida law that Birks, Hemmert, and Grossi were liable for intentional infliction of emotional distress (“IIED”). The defendants moved for summary judgment, asserting qualified immunity as to the federal claims and state-law immunity as to the state-law claim.

This interlocutory appeal and cross-appeal arises from the District Court’s denial of qualified and state-law immunity to Birks, Hemmert, and Grossi. Birks, Hemmert, and Grossi appeal these denials of immunity. Additionally, Aguirre and the appellants ask us to exercise pendent appellate jurisdiction over their appeals of various other determinations of the District Court. After careful review, and with the benefit of oral argument, we exercise our jurisdiction over the denials of immunity and over two evidentiary issues enmeshed with the denial of qualified immunity to Birks. We ultimately affirm in part and reverse in part.

Our opinion proceeds in six parts. In Part I, we recount the two-decade background of this appeal. In Part II, we assess the issues over which we may exercise interlocutory appellate jurisdiction . In Part III, we address two evidentiary issues which Birks appeals . In Part IV, we evaluate the appellants’ qualified-immunity appeals. In Part V, we consider Hemmert and Grossi’s state-lawimmunity appeals. And in Part VI, we conclude.

I. Background

We begin with the background of this appeal. First, we describe the circumstances of Aguirre’s arrest and prosecution.

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Then, we review Aguirre’s post-conviction proceedings, concluding with the dismissal of all charges. Last, we examine the proceedings before the District Court and the basis of this appeal.

A. The Murder Investigation and Trial Around 9:00 AM on June 17, 2004, Mark Van Sandt entered the home of his girlfriend, Samantha Williams, at 121 Vagabond Way in Altamonte Springs, Florida. Samantha lived there with her mother, Cheryl Williams, and her grandmother, Carol Bareis, but spent the night with Van Sandt at his parents’ home. 1 When Van Sandt opened the door, he saw Cheryl lying on the ground. He called 911 and described Cheryl as covered in blood and cuts. Her pants were down, and she was cold, stiff, and not breathing.

The Seminole County Sheriff’s Office (the “SCSO”) dispatched deputies and EMS to the scene. Inside the home, the deputies observed Cheryl’s body and noted bloody shoeprints on the floor. A paramedic pronounced Cheryl deceased. About an hour later, Van Sandt realized Bareis’s whereabouts had not yet been discovered . Deputies then reentered the home and discovered Bareis in a separate room lying deceased in a pool of blood near her wheelchair. She had been stabbed twice, and she had a blunt force injury to her face.

Robert Hemmert and Jacqueline Grossi arrived on scene at approximately 9:50 AM. The SCSO employed Hemmert as a Major

1 We refer to Cheryl and Samantha Williams by their first names hereinafter

to avoid confusion.

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23-10811 Opinion of the Court 5

Crimes Investigator and Grossi as a Crime Scene Analyst. Hemmert led the homicide investigation while Grossi led the crime scene investigation. At the scene, Hemmert coordinated the information -gathering and canvassing of the neighborhood. After obtaining a search warrant for the home, Grossi began processing the crime scene and collecting evidence.

Hemmert and another officer formally interviewed Van Sandt at approximately 11:30 AM. Van Sandt told them that he and Samantha were at the residence the previous night until about 11:30 PM, when an argument arose. According to Van Sandt, tensions were high between Samantha and Cheryl—the home lacked air conditioning, Samantha was on edge from quitting tobacco, and the two commonly engaged in mother-daughter arguments. But there was no physical fighting. Van Sandt stated that neither he nor Samantha left his home during the night—Samantha did not have a car or even a driver’s license. Van Sandt also revealed that Samantha had intermittent explosive personality disorder and had “been Baker Acted a couple times” due to “a nervous breakdown.” 2 Hemmert and the other officer also formally interviewed Samantha at 1:35 PM. Samantha initially told the officers that she and Van Sandt spent the night at a friend’s house. When confronted on this deception, Samantha admitted that she lied because Van

2 The Baker Act refers to the Florida Mental Health Act, which allows for an

involuntary healthcare evaluation of a person suffering from mental illness. See Fla. Stat. § 394.463.

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Sandt’s parents did not want her in their home.3 Samantha acknowledged that she and Cheryl quarreled the night before but claimed they only physically fought when Samantha was younger. Hemmert noticed scarring on Samantha’s arm, which Samantha explained as burns from the ovens at her workplace.

During both their interviews, Van Sandt and Samantha reported previous run-ins between Samantha’s household and a neighbor living next door at 117 Vagabond Way. Van Sandt said the neighbor, whom he called “Little Mexico,” walked into Samantha’s home uninvited in the early morning. Samantha called the neighbor “Shorty” and reported that on at least three occasions he entered the home uninvited. One time, she woke around 3 AM to the neighbor standing over her bed. She told Hemmert and the other officer that the neighbor was intoxicated from drugs when he was discovered in the home.

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