Detectives probe how teen got gun as California community mourns

LOS ANGELES - As Santa Clarita mourned the two students killed in the shooting at Saugus High School, law enforcement authorities tried to uncover a motive for the attack and how the shooter obtained the gun he used.

Throughout the day and into Friday night, residents, students and families came together around a makeshift memorial in Central Park, a short walk from the school.

The teenager who opened fire on his classmates before shooting himself died Friday night at a hospital, authorities said. Officials said his mother was with him.

A key focus of the investigation is how Nathaniel Berhow got the .45-caliber handgun he used to carry out the attack Thursday morning.

The Los Angeles County Sheriff's Department is working with the federal Bureau of Alcohol, Tobacco,