Friends told investigators, Koffi tried to leave the house around 8 pm, punched a woman at the house, stabbed a man with a pencil and choked another man.
He got out of the house, into his rental car and backed into a parked car before crashing into the garage of their rented house.
Koffi then ran down the street until a security guard stopped him.
Investigators say he picked up a landscaping stake and stabbed the security guard with it, before knocking him to the ground.
Koffi then got into the security guard's truck and sped toward a man and a woman who were walking by, hitting them both.
Then, police say Koffi drove off the road and toward another couple who were standing on a bluff, hitting that woman.
Investigators say Koffi kept driving, into a wall and through yards.
A CHP officer and Sonoma County Sheriff's Deputy got there about the same time and say Koffi tried to run down both officers.
The deputy fired several shots when Koffi wouldn't stop.
Investigators say at least three bullets hit him through the windshield of the security guard's truck.