As TMZ previously reported, Tyson was arrested after a run-in with a photog at LAX. Tyson was initially booked for misdemeanor battery, but the L.A. City Attorney officially rejected the case, citing "insufficient evidence."
According to the civil lawsuit, the photographer -- Antonio Echavarria -- claims Tyson attacked him, hit him with a closed left fist, and broke his camera. Echavarria also claims he suffered a concussion and strain to his spinal cord.
He's asking for $25 million in damages.