LA County Sheriff's Department investigates violent arrest of transgender man

Transgender man was thrown to the ground and punched by an LA County sheriff's deputy during a traffic stop.
Surveillance video shows the deputy using excessive force although the reason for the confrontation is unclear.
Man was subjected to invasive questions about his gender identity while in custody after the arrest.
Sheriff's department has launched an internal investigation into the incident amid allegations of misconduct.
Man is pursuing legal action against the sheriff's department over claims of assault, discrimination and mistreatment.