Twice this week robbers in Detroit were shot by concealed carry holders who refused to be victims.

On Thursday night, a pair of teenagers approached two utility workers with the intention of robbing them. What the criminals didn't know is one of the workers was a concealed carry holder. He pulled out his handgun and shot both teens, injuring them -- one crucially and the other seriously.

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"He's protecting himself. I mean, he's licensed to carry a concealed weapon, you know, so he knows what he's doing," said Denzel Williams, who heard the gun shots from a distance.

Last Friday, a high school basketball coach was walking two female players to their cars after practice when they were approached by two teen boys. The teenagers "announced a holdup" and grabbed the coach by his chain necklace and stuck something in his chest, WXYZ-TV reports. Police did not reveal if it was a gun.

After struggling with the teens for a period of time, the coach is able to get some distance between himself and his attackers. The 70-year-old coach then pulled out his concealed handgun and fired at the robbers, hitting both of them, one of them fatally.

Police say 16-year-old Michael Scott was killed in the botched robbery attempt. His 15-year-old accomplice was taken to the hospital in serious condition. Though the high school coach was initially taken into custody, a police source says the shooting appears to be a justified, self-defense homicide.