NEWARK, N.J. -- A man who admitted pulling the trigger in the execution-style killings of three college students in a New Jersey schoolyard has been sentenced to prison for life.

Melvin Jovel pleaded guilty to murder, attempted murder and weapons charges days before his trial was to begin in September.

A judge sentenced Jovel on Thursday to three consecutive life sentences plus 20 years.

The 21-year-old did not express remorse when he addressed the court in Spanish.

The sole survivor of the 2007 slayings criticized him for not looking at her while she spoke in court.

Prosecutors say Jovel and five others lined up the victims against a wall in Newark and shot each in the back of the head. All the victims attended or planned to attend Delaware State University.