Dr. Jessica Dwyer spends her days determining why people died — not necessarily how, or under what circumstances, but the medical cause behind each death that crosses her desk at the Southwestern Institute of Forensic Sciences. At 42, she is Dallas County's chief medical examiner, and the first woman ever to hold the position in the office's history.
Dwyer joined SWIFS as a medical examiner staff member in 2017 and became director and chief of the institute in 2024, according to The Dallas Morning News. She now leads 13 full-time medical examiners, working alongside 20 forensic investigators and 12 autopsy technicians, per the same profile. Dwyer has testified close to 100 times over the course of her career, the paper reports.
Dwyer's rise to the top of SWIFS came after Dr. Jeffrey Barnard's retirement, who led the agency for 33 years and served Dallas County for 37 years, according to KERA News. She is only the third chief medical examiner in the agency's history since it was established in 1969 through a cooperative agreement between Dallas County, UT Southwestern Medical Center, the City of Dallas, Parkland Hospital, and the Dallas County Medical Society, according to Dallas County government records.
A Job Built on Science, Not Speculation
A medical examiner is a licensed physician with specialized training in forensic pathology, a discipline that combines medicine and science with law enforcement, the legal system, and on-scene investigations, the Dallas Morning News profile explains. Dwyer examines human bodies to determine how people died, and her role, as she put it in the profile, is to tell why a person died — not necessarily the context behind it. An autopsy, for instance, cannot determine whether someone who fell from a cliff jumped, was pushed, or tripped accidentally, though it can determine that the resulting blunt-force injuries came from a fall.
That distinction matters in courtrooms across North Texas, where Dwyer connects evidence when someone dies under suspicious circumstances and advocates for individuals who died in egregious and violent circumstances. In April, she served as a key prosecution witness in the capital murder trial of Tanner Lynn Horner, testifying about her December 2022 autopsy findings that 7-year-old Athena Strand died from blunt force trauma, smothering, and strangulation, according to FOX 4 News Dallas-Fort Worth.
Coping With Trauma on the Job
Dwyer told the Dallas Morning News that all of us have a little bit of a twisted personality and dark humor, describing it as a coping mechanism for people who regularly encounter traumatic deaths and disturbing scenes. It is a candid admission from someone whose academic credentials include a bachelor's degree in animal science from Texas A&M University, a medical degree from UT Health San Antonio, and residency and forensic fellowship training at the University of Pittsburgh Medical Center, according to UT Southwestern Medical Center.
Dwyer also holds an Assistant Professor appointment in the Department of Pathology at UT Southwestern, where SWIFS staff train pathology residents and forensic fellows, per the medical center's records. The institute provides comprehensive medicolegal death investigations and crime laboratory services to roughly 2.6 million Dallas County residents and several neighboring North Texas counties, according to Dallas County government.
A System Under Strain
SWIFS reported in its fiscal year 2025 budget presentation that its autopsy caseload grew 22% between 2019 and 2023, pushing medical examiners to average 335 autopsies a year — above the strict upper threshold of 325 set by the National Association of Medical Examiners, which warns that offices exceeding that number risk losing national accreditation, according to Discover Magazine. NAME's ideal target is just 250 autopsies per pathologist per year.
That workload lands atop a nationwide shortage of forensic pathologists. The United States has approximately 500 board-certified forensic pathologists actively practicing against an estimated national demand of nearly 1,300 physicians, according to the National Academies of Sciences, Engineering, and Medicine. SWIFS also partners with the Dallas County District Attorney's Office and local police through federally funded programs, including a $3.8 million grant awarded in December 2024, to process untested sexual assault kits and address more than 3,000 unsolved Dallas homicides, per the Forensic.
SWIFS regularly handles cases that later become part of Dallas-area news coverage, including skeletal remains found near Sulphur Springs and a body recovered from the Trinity River near Great Trinity Forest, both sent to the institute for forensic identification and cause-of-death analysis. Dwyer was photographed at the SWIFS office and in one of its labs on July 27 as part of the Dallas Morning News profile, offering a rare look inside an institution that trains the next generation of forensic pathologists even as it works to keep pace with the volume of cases arriving at its doors.
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