Virginia woman strangled days after dumping her deceptive boyfriend

When first responders arrived at Katlyn Lyon Montgomery's apartment and discovered her unconscious, they suspected a drug overdose. Her roommate, Jacob Piercy, had called 911 after Montgomery's daughter, Milani, alerted him that there was something wrong with her mother.  In:

When first responders arrived at Katlyn Lyon Montgomery's apartment and discovered her unconscious, they suspected a drug overdose. Her roommate, Jacob Piercy, had called 911 after Montgomery's daughter, Milani, alerted him that there was something wrong with her mother. 

But as "48 Hours" correspondent Erin Moriarty reports, there was no overdose, and investigators soon uncovered Katlyn had been murdered, in "The Sneak Attack on Katlyn Lyon" airing Saturday, Jan. 31, at 10/9c on CBS and streaming on Paramount+. 

When Montgomery arrived at the hospital in the early morning hours of Jan. 7, 2022, medical staff noticed injuries forming on her head and neck. Lead investigator Robbie Burnette with Virginia's Bedford County Sheriff's Office focused on documenting those injuries. At the apartment, investigator Michelle Alderson found what may have caused those injuries on Montgomery's neck: a multiple charging cord adapter wrapped up in Katlyn's comforter. 

Investigators turned to Piercy, as he was the only other adult in the apartment and there was no sign of a break-in.

"So, we were looking at him ... pretty heavy at first ... he was our No. 1 suspect at that point," Burnette told Moriarty.