WATCH: Bystanders stop, detain would-be carjacker

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SAN DIEGO -- The violent struggle to stop a man from carjacking a woman and child in a minivan was caught on camera.

A defenseless little girl screamed from the back of the minivan as a group of men fought to keep Ismael Velasquez from driving off with her.

"I seen a guy in the back seat choking out the driver and there were a couple of other people in the widow grabbing the keys from him," Aaron Leaf said.

Leaf was inside a restaurant when he heard the commotion. When he got outside he started shooting the chaos on his cellphone.

"I'm just really trying to figure out what exactly is going on, once I realized I didn't feel sorry for the guy," Leaf said.

This isn't the first time Velasquez has been in trouble with the law. His family said they were shocked he would do something like this.

"When I saw the video, when he was aggressive, it was different," said Elais Velasquez, Ismael Velasquez's younger brother.

Elais Velasquez said his brother has been struggling with alcohol and drugs for sometime.

"He probably has a lot of depression," Elais Velasquez said. "He has been using some substances."

An officer arrived and ordered Ismael Velasquez on the ground and when he didn't, the officer made him.

EMTs checked out the mother and child, who were scared but not harmed.

For those watching, they knew this could have been a much more tragic situation.

"I think it's great that people will stand up for each other," Leaf said. "I know that wouldn't happen in a lot of other neighborhoods."

Velasquez was booked into the San Diego Jail on charges that included attempted carjacking, attempted kidnapping and attempted auto theft.