A sex offender from Colorado Springs is accused of killing a mother who was out jogging in Connecticut back in 2014.

The suspect's mother still lives in the Springs and told our news partners at The Gazette that she didn't know her son had turned himself in.

11 News reached out to the suspect’s mother but she did not want to comment on her son’s arrest.

William Leverett, 27, was convicted of child sex assault in Colorado Springs back in 2011. He moved to Connecticut after that.

In 2014, 54-year-old insurance executive Melissa Millan was found stabbed to death along a popular trail in Simsbury. The case went unsolved for four years.

Until Sept. 19, when Leverett went to the police station to confess.

During two separate hours-long interviews, Leverett was reportedly able to provide police with details never shared publicly, such as what Milan was wearing the night she was killed, and helped investigators locate a glove he had hidden, which contained Milan's DNA.

The killing was random and not premeditated, Leverett allegedly told investigators. According to arrest papers, which detail the interrogations, he said that on the night of Nov. 20, 2014, he had left a sex offenders therapy group and was feeling lonely. He took a walk on the same trail Milan was jogging on, seeking out "human contact." When he saw Milan, he allegedly said he felt attracted to her and then became angry when he realized he couldn't "have her."

"She was way out of my league," he allegedly told detectives.

The arrest papers say he approached her in an unlit section of the trail and stabbed her in the chest.

Our sister station in Hartford talked to Leverett's landlord, Brian Durso.

"This young man went to the leaders of the church that I had been associated with and he was, and they made a decision after I think a lot of tear and prayer to go to the authorities,” Durso said.

Authorities didn’t arrest Leverett until four days after he initially confessed, which Durso said he didn't understand.

"Some of us are asking what is it that prevented them from holding him so that he would be safe and so would everybody else after a confession like that. It's not like he robbed a bookstore, he knew what he was going to be up against. We are just wondering why it was that he was left alone."

Leverett is now in custody and is being held on a $2 million bond. His next court appearance is scheduled for Oct. 9, according to the Courant.