15-year old Jaime Gonzalez shot and killed by police in school

THIS IS AN UPDATE FROM A PREVIOUS POSTING:

15-year old eighth grader Jaime Gonzalez was shot dead by police in the hallway of his middle school. Police responded to a report of the boy wielding a gun, and when the boy apparently raised the weapon, the officers shot him. He later died in the hospital.

It turns out the boy's gun was a realistic-looking pellet gun.

According to the article:

The boy's father, Jaime Gonzalez Sr., said he had no idea where his son got the gun or why he brought it to school.

"We wouldn't give him a gift like that," he told The Associated Press from the family's home, where other relatives and friends of his son were gathering Wednesday night.

The boy was apparently well-behaved prior to that day. It is currently unknown where the boy got the gun or why he brandished it.

One might wonder, what is the reasoning behind making a pellet gun look like the real thing?

UPDATE (1/8/12): 911 call and additional information on the funeral.