Tyrese Gibson‘s grandmother was detained and his house searched when cops executed a search warrant in connection to his Cane Corsos’ killer behavior … and, we now have body cam breaking down the incident.

The search went down September 22 … and, the clip shows officers barging into Gibson’s house — marching past a big Transformers statue in the mansion’s foyer.

Fulton Country Police and Animal Services look around the property, taking photos as they go … before the clip cuts to the front of the property — where Tyrese’s grandmother has been sat in the back of a police car.

As we’ve reported … Tyrese was arrested booked for animal cruelty Friday morning. He posted $20K bond and was released.

TG’s dogs are accused of killing another while running around his neighborhood unattended late at night on September 18.

Video captured them barking at a neighbor’s door shortly before they ran across the street toward the house where the spaniel was killed.