Prosecutors: Teen accused of beheading classmate may have been fueled by jealousy

A teenager accused of decapitating his Lawrence High School classmate in 2016 may have been fueled by jealousy, prosecutors said Monday as opening statements in murder trial got underway.

Jury selection in 17-year-old Mathew Borges’ trial took place last week in Salem Superior Court following several postponements, and for the first time in more than two years, prosecutors on Monday revealed a possible motive in the brutal beheading of 16-year-old Lee Manuel Viloria-Paulino.

Borges is charged with first-degree murder in the November 2016 death of Viloria-Paulino. He was 15 at the time but is being tried as an adult.

Viloria-Paulino’s body was found near the Merrimack River by a woman walking her dog a couple of weeks after his family reported him missing. Police found his head nearby.

Borges allegedly told police that he and Viloria-Paulino went to the river to smoke marijuana and then split up.

Prosecutors introduced a journal that Borges and his girlfriend kept together, which indicated jealousy as a likely driving factor in the murder.

Borges, who was sporting a white dress shirt a much shorter hair during his court appearance than at his initial arraignment, wrote an entry about growing angry after seeing Viloria-Paulino sitting with his girlfriend in the school cafeteria and accused her of sleeping with him, according to prosecutors.

The last entry was a “kill note,” which prosecutors say was written in the third-person without mention of the victim.

A person claiming to be the suspect’s friend told detectives that Borges came to him saying he “did something bad” and he “stabbed and cut his head off,” according to authorities.

Viloria-Paulino’s family have said that police mishandled their son’s disappearance after initially insisting that their son had run away.

Borges’ defense has suggested that Viloria-Paulino may have been killed in a violent gang attack. No DNA, no weapon and no physical evidence that link Borges to the crime have been found.

A not guilty plea was previously entered on behalf of Borges.

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