A 17-year old boy decapitated a classmate two years ago because he suspected he was romantically involved with his girlfriend at the time.
Mathew Borges was just 15 years old when he allegedly killed fellow student Viloria-Paulino, beheaded him, cut off his hands, and then dumped his remains in the Merrimack River in November 2016.
The girl, Leilany Dejesus, who is now 18, testified on Monday that Borges was consumed by rage and jealousy when he saw her talk with Lee Manuel Viloria-Paulino at Lawrence High School in the Boston suburb of Lawrence.
Dejesus shed tears as she described how Borges would scold her for talking to Viloria-Paulino, Daily Mail reports.
Borges accused her of flirting with Viloria-Paulino, she testified.
She said that Borges was so angry that at one point the school dean had to escort him from the cafeteria, WBTS-TV reported.
