UPDATE: Feb. 6 at 7:21 p.m.
Chanel Lewis, the man accused of murdering 30-year-old jogger Karina Vetrano last summer, allegedly gave two confessions in which he told authorities that he "lost it" and strangled her, an official close to the investigation told ABC News.
In those alleged confessions, the official said Lewis indicated that he was angry about something on the day of the murder. He gave authorities a detailed account of the attack but denied sexually assaulting Vetrano, the official added.
A man has been arrested in connection with the murder of Karina Vetrano, a 30-year-old woman who went for a run last summer and was later found dead in a secluded marsh, the New York Police Department announced Sunday.
Chanel Lewis, 20, of Brooklyn, was taken into custody Saturday around 6 p.m., the NYPD said Sunday. Formal charges and an arraignment are still pending. Authorities said Lewis doesn't have a prior arrest record.
Chief of Detectives Robert Boyce said Lewis was identified as a suspect after police went back through 911 calls and found one that mentioned a suspicious person.
Lewis was interviewed by police on Thursday and they also obtained a DNA sample from him. That DNA sample was then linked to the DNA found under Vetrano's fingernails.
WATCH | Authorities give an update on the investigation into the murder of Vetrano.
"She had the DNA under her nails," Boyce said. "She had [a] touch DNA on her back and there was more DNA on her cell phone. So three incidents. That's how we were able to bring this profile up. And that's how we made the link."
Lewis was arrested after he offered several incriminating statements regarding "each step of the assault," according to police. Authorities said it is unlikely that Lewis and Vetrano knew one another. Instead, police said they believe the violence occurred as "chance encounter."
Vetrano was killed on Aug. 2, not far from her home in Queens, New York.
Vetrano went down the same jogging path she and her father, a retired firefighter, usually took. However, her father hadn't been able to join her that day.
Authorities later discovered her badly beaten body.
The Associated Press contributed to this report.