Damone Christopher Williams-Tillman told officers that his 19-year-old beau told him she was seeing someone else, so he attacked, repeatedly stabbing her.
He said he couldn't remember how many times he stabbed her because he closed his eyes while doing it but told investigators he remembers throwing his knife and Bishop's cell phone out of his car window, over a bridge with water, as he drove away from the scene, according to WCCO.
A jail guard testified that he overhead the 19-year-old making a phone call saying: "I messed up real bad."
After a pause he then reportedly said, "I killed someone."
Williams-Tillman remains in custody on a second-degree murder charges which could result in a prison sentence of up to 40 years.