From [HERE] An investigation is underway to determine if Santa Ana police officers used excessive force Sunday night while taking a Latino man into custody in an incident captured by a neighbor on her cell phone.

One family who lives on the 2000 block of Kilson Drive were home when officers arrested Jesus Martinez in front of their house around 7:20 p.m. and began filming the confrontation after witnessing what they perceived as an excessive use of force.

Martinez, who police say is a documented gang member, had been neutralized as a threat when police continued to deliver a series of severe blows and unfair treatment, said Roxana Cedillo, who filmed the arrest from her living room window.

“I’m very grateful that they do put themselves in the line to help us, and help all innocent people. But in that case, he was already on the ground," she told KTLA. "There was no need for the brutal part.”

The graphic video begins with one Santa Ana officer holding the man identified as Martinez to the ground as he delivers orders for the suspect to put his hands behind his head.

“Get your f—ing hands behind your back,” the officer is seen shouting while holding the man identified as Martinez by the wrists.

Martinez is heard replying, “They’re behind my back sir, let me put them behind my back sir.”

Though Martinez was failing to comply with the officer's orders, the officer was also making it nearly impossible for him to comply, according to Cedillo.

“The officer was already on top of the suspect and was telling him to put his hands in the back, but the suspect had them right here,” she said, motioning with her arms a bit in front of her face, “not where he wanted them. At the same time, I did see the officer holding his hands, telling him, ‘Put them in the back.’”