A mistrial was declared Friday in the punishment phase in the trial of a former John Jay High School student.

A former John Jay High School student who was accused of fatally stabbing a friend was found not guilty of murder on Wednesday.

A jury will have to decide this week whether the fatal stabbing of a John Jay High School student during a lunch break last year was an act of murder or self-defense.

Jesus San Miguel faces up to life in prison if found guilty.