Colorado Sheriff: School Shooter Apparently Acted Alone

(Centennial, CO) -- Authorities in Colorado believe the suspect in Friday's shooting at Arapahoe High School near Denver acted alone.
Arapahoe County Sheriff Grayson Robinson says the gunman, who was identified only as a student at the school, was found dead at the scene of a self-inflicted gunshot wound. Two other students were wounded. Robinson also praised a teacher who was targeted by the shooter with making the best decision possible in leaving the building. The sheriff credited the unnamed teacher with helping to prevent the situation from being even worse.
Colorado Governor John Hickenlooper says police fearlessly entered the school to hunt for the shooter.
Robinson explained the status of the first of two people who were shot.

Robinson was asked about possible explosive devices the gunman may have had.
Robinson said the gunman made no attempt to hide his intentions.