Last year, Thomas Bruce was accused of assaulting three women and killing one of them at the Catholic Supply of St. Louis retail store Nov. 19 in Ballwin, Mo., a suburb of St. Louis.

Now, authorities are wondering if Bruce may be connected to a 1985 murder in Tennessee, Fox 2 Now St. Louis reported. One complicating factor: another man was already tried and executed for that murder.

Suzanne Collins was a 19-year-old Marine Lance Corporal in an avionics training school when she was murdered in Tennessee in 1985. According to authorities, Sedley Alley confessed to the crime but eventually retracted his confession, claiming he had been coerced into it. Alley was executed in 2006.

Bruce's possible connection to the 1985 murder was revealed in court last week by Barry Scheck with the Innocence Project, Fox reported. The Innocence Project is an organization that works to clear innocent people of wrongful convictions.

According to Fox, Scheck told the court that there was untested DNA from Collins' clothing that could help to clarify whether Bruce was involved in her murder. Bruce reportedly attended the same school as Collins at the time of the murder.

"It is clear that if we don't get a DNA test in this case, it is wrong," Scheck said in court. "It is fundamentally unfair. He was entitled to that test." He added that the people of St. Louis deserve answers about Bruce.

According to Fox 2, the Tennessee Attorney General's Office opposes the DNA test on the grounds of not letting litigation for the 1985 case drag on forever, and on the grounds that Sedley is already dead.

A judge is set to rule Nov. 18 whether there will be additional DNA testing allowed on Collins' clothing in order to investigate the possible connection to Bruce.

Bruce had no known convictions in November 2018, when he sexually assaulted, shot, and killed 53-year-old Jamie Schmidt and sexually assaulted two other women.

Schmidt was a customer in the Catholic Supply store at the time of the attack and was transported to a hospital where she later died of her injuries. She was survived by her husband and three children.

Authorities at the time said Bruce did not appear to know Schmidt and that the attack seemed to be at random.

Fox 2 reported that after the 2018 incident, their reporters uncovered two other incidents involving Bruce for which he had not yet been charged.

In one incident, a 77 year-old woman recognized a photo of Bruce on T.V. and reported that in September 2018, just two months prior to the Catholic Supply store attack, Bruce had sexually assaulted her. Bruce was subsequently charged with kidnapping, sexual abuse, and assault for the incident.

The next month in October 2018, a man reported that Bruce's road rage had caused a deliberate accident on US Highway 61, according to Fox. A dashcam video retrieved by Fox 2 in St. Louis reportedly revealed Bruce yelling and cussing at a police officer responding to the scene.

Bruce's trial is scheduled for next October. Authorities told Fox in St. Louis that they are still investigating whether Bruce is connected to any other criminal activity.