16-year old boy shoots a deputy with the officer's gun, during transport

Deputy Fred Ashworth, 45, was transporting a 16-year old boy back to a holding facility after a court hearing. The boy was handcuffed and shackled, both hands and feet, but as he was being led back to his cell, the boy overpowered the deputy, got hold of the deputy's .40-caliber handgun, and shot Ashworth twice, critically injuring him. The deputy wasn't wearing his bulletproof vest, against policy

From the article:

Ashworth has 20 years of experience and was assigned to the prisoner transport division. He was returning the teen to the juvenile center following the teen's hearing in Orange County on charges of Unauthorized Use of a Motor Vehicle and Evading Arrest/Detention.
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Investigators want to know how the juvenile got the deputy's gun and why the 16-year-old shot him twice in the upper chest. Law enforcement officers have been at the detention center all day gathering evidence to help them with the case.
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Carroll says the teen was shackled hand and foot and handcuffed but somehow got out of the handcuffs. Investigators are trying to determine how the juvenile managed to get free of the cuffs.

The deputy fought off the boy with a taser.

Every gun in the hands of a child must first pass through the hands of an adult.