SALT LAKE CITY, UT — James Wallace Petersen III has been sentenced to five years to life in prison for murdering Theresa Morlock, whose death went unsolved for decades after she was found in her apartment in February 1993.

Petersen received the sentence Monday, September 21, after pleading guilty in July to murder, a first-degree felony, ABC4 reported. The sentencing range reflects the law in effect in 1993, when Morlock was killed. An aggravated sexual assault charge was dismissed under the plea agreement. The sentence is not a promise of release after five years.

The Discovery in Morlock’s Apartment

Morlock was 35 when police found her dead February 24, 1993, at the Wood Haven Apartments, 643 South Redwood Road. According to court documents described by ABC4, a maintenance worker had first gone to her apartment two days earlier to collect a leased microwave because she had stopped making payments.

No one answered his knock. The door was unlocked, and when he opened it, he saw the lights and television were on. He announced why he was there, received no response and left. On February 24, he returned with permission to enter, found Morlock on her bedroom floor and reported the discovery.

Responding detectives found her lying on her back. Blood and bedding nearby indicated a struggle, and investigators documented evidence of sexual assault. An autopsy determined she died from asphyxiation caused by strangulation and smothering and had severe injuries consistent with sexual assault.

A Visitor During All-Star Weekend

A friend who lived in the complex and sometimes helped Morlock with rides and money testified that he drove her to 600 West North Temple Street on February 22. He waited nearby for about an hour while she tried to find work, then left.

When he visited her apartment around 10 or 11 that night, he encountered a man she had brought home. The friend did not speak with him but learned that the visitor was from Arizona and had come to Salt Lake City for the NBA All-Star game.

How Investigators Reached Petersen

Investigators collected suspect DNA and entered it into the Combined DNA Index System, known as CODIS. A hair recovered from Morlock’s body was later submitted to Intermountain Forensics Lab for forensic genealogy testing. A genetic profile and family-tree research ultimately pointed investigators to Petersen.

During questioning, Petersen allegedly told detectives he had lived in Arizona in 1993 and had relatives in Salt Lake City. His father had bought him NBA All-Star tickets, and he traveled to Utah for the game.

Asked whether he had met a sex worker during the visit, Petersen said it was possible, according to the court documents. He described sometimes spending a few hours drinking beer and talking with sex workers. When detectives confronted him about his DNA being found on Morlock, he allegedly said he could not remember and could neither confirm nor deny hurting her.

After the interview, Petersen packed his belongings and moved to South Dakota, the documents said. Prosecutors alleged that he left to avoid prosecution. Salt Lake City’s homicide squad arrested him in March 2026 with assistance from the U.S. Marshals; the department also credited Cedar City police with helping.

Salt Lake County District Attorney Sim Gill said he hoped the conviction brought Morlock’s family some measure of accountability, acknowledged their decades of waiting and mourned their loss. He also credited prosecutor Brett Keeler, support staff and Salt Lake City detectives for their work bringing the case to a resolution.