Attorney Bob Moen, who represents Backe and six others arrested in the incident, said he met with FBI agents on Wednesday to ensure there is a fair investigation into the incident.
"I have initiated a formal complaint against the officers involved for their actions against the clients I represent for violating their civil rights," Moen told Houston TV station KRIV.
Police spokesman Capt. Walter Braun has said an internal affairs investigation has been launched into the incident. Braun did not immediately return a message left by The Associated Press on Friday.
Backe was among 10 people arrested Oct. 5 when a wedding reception at a hotel bar disintegrated into a brawl with police. Witnesses have said police used excessive force. The father and brother of the bride were stunned with a Taser, and one of them was pepper-sprayed.
The brawl escalated after police tried to arrest the bride's brother for allegedly entering a pool bar area with an open liquor container. During a struggle, the brother hit one officer in the chest and another in the face. Others at the bar piled on when police tried to handcuff him, according to police reports.
Backe, 30, a member of the wedding party, ignored police orders to back away from the fight, and struggled with officers who were attempting to handcuff him, according to police reports. One officer said he hit Backe twice in the face before handcuffing him.
Backe was charged with interfering with a police officer and resisting arrest, both misdemeanors.
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