A lot of people seem to mistake carjacking for car theft. Especially mentioning that the person who shot the 13 year old was a security officer gives a wrong impression on what happened.

Carjacking is when the robber(s) take control of a car with a person inside the car. This is what happened here, with the security guard being inside the car. Under these circumstances it's perfectly reasonable to consider shooting the robbers and it's unreasonable to expect the security guard being able to identify the robber as a 13-year old harmless child. There is significant plausible risk to the person inside the car to warrent lethal force during self-defense.

Car theft is stealing an empty car. Shooting someone would be entirely unreasonable during a car theft.

The article doesn't mention wether the car had window tint and the two kids where unaware of the person inside or if they intentionally tried to rob the person. That information might change what can be considered reasonable response.

Imagine how fucked and shitty your life has to be, to be a 12 or 13 year old trying to carjack people.

Note to thread: An off-duty security officer with the U.S. Marshal's Service is not a security guard.

Rumour has it that she called him by his full name -- middle name and all.