The family of a Florida man who died after Georgia sheriff's deputies repeatedly used their stun guns on him is asking for a federal investigation into his death.

Attorney Chris Stewart, who represents the family of Chase Sherman, said he sent the request Tuesday to the Civil Rights Division at the Department of Justice.

Sherman's mother called 911 on Nov. 20 as they traveled on Interstate 85 from Atlanta to their home in Destin, Florida. She said her 32-year-old son was "freaking out" and had taken a synthetic drug known as spice.

Video from Coweta County sheriff's deputies' body cameras shows the deputies struggling with Sherman in the back of an SUV until he's still and they later realize he's not breathing. Sherman was later pronounced dead at a hospital.