ARLETA, LOS ANGELES (KABC) -- The family of a 15-year-old boy with special needs says he was wrongfully detained at gunpoint by federal immigration officers . Now, they've begun the process of suing the federal government.

"I just seen all of these men coming out of that truck, pointing their guns and a taser gun at my son and myself," said Andreina Mejia, the boy's mother. "I looked at my son's reaction and saw that he was scared. He didn't know what was going on."

The encounter happened on Aug. 11 as Mejia and her son sat in their car outside Arleta High School. Immigration officers stormed into the area to arrest who the Department of Homeland Security (DHS) identified as Cristian Alexander Vasquez-Alvarenga, a Salvadoran national and suspected MS-13 pledge.

Mejia and her son were

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