Police in Philadelphia say it was a 16-year-old boy who pulled the trigger, killing 38-year-old dad trying to protect his daughter during a carjacking late last week.

6ABC in Philly reports the teen, who wasn't initially named in the report, will be tried as an adult.

Also charged over the weekend in the case was the teen's 21-year-old brother, Maurice Roberts. Both are in custody.

Police tell the news station that the two brothers went to Center City with the intention of robbing someone.

Meanwhile, family, friends and neighbors are mourning the violent death of Gerald Grandzol, who was fatally shot just after 8 p.m. Thursday in the 1500 block of Melon Street, where he lived.

From 6ABC:

Grandzol had just parked the family SUV when two men approached. One was armed with a gun. Police say the suspects took his wallet and then tried to steal his SUV with his 2-year-old daughter inside, but he wouldn't let them. He was shot in the head at point-blank range.

"They wanted the car and he wouldn't give up the car. And they shot him for it," Philadelphia Police Captain John Ryan told 6ABC.

The shooting was caught on surveillance cameras, but the video was hard to watch, even for veteran cops:

"In almost 29 years, it's one of the most disturbing videos I've ever seen," Philadelphia Police Chief Inspector James Kelly told 6ABC.

Grandzol was a noted community activist in his neighborhood of Spring Garden, where he was a member of the Spring Garden Civic Association.

On Friday a Facebook page titled "Remembering Gerard Grandzol" was formed, 6ABC reports.

And neighbors say the fatal shooting reflects a rising wave of muggings and other violent crime in the city.