Newly-released body camera captures the tense moments leading up to officers opening fire on a man during an interrogation at Minneapolis City Hall last December.The shows officers ordering then-18-year-old Marcus Fischer to drop his weapon before firing.Fischer pleaded guilty to one count of first-degree assault and one count of being a prohibited person in possession of a firearm earlier this month, as well as two other counts.He has been sentenced to 74 months, which is just more than six years.Fischer admitted to shooting and injuring a man he was attempting to buy a gun from in December in Minneapolis.Six days later, he was questioned about it by police at Minneapolis City Hall. When he was left alone in a room, Fischer pulled out a knife that police had not confiscated from him and began stabbing himself.The shows that 12 seconds after Minneapolis officers walk out of the police interrogation room at Minneapolis City Hall - leaving Fischer inside - he pulls out a knife that had not been confiscated and begins to stab himself in the neck.For at least nine minutes, Fischer is inside the room alone with the knife. Police won't go in until an officer with a Taser is there.When that happens, police unlock the door, and fire a Taser at Fischer. It appears the Taser missed or doesn't work.Twelve seconds later, Fischer is still standing. Police say he is walking toward them with the knife in his hand. That's when officers open fire.After Fischer is shot and on the ground, officers tell him to move over toward the wall because his right hand is underneath him and they can't see the knife.Once the knife is spotted, it's another minute before he is pulled from the room.