officials say this is all part of a long-term plan to stop the flow and trafficking of guns before they get into the hands of criminals. and, of course, the end goal here is to lower the city s crime rate. david? alex perez, you ll stay on this into the night. thank you. meantime tonight, calls for an independent investigation at this hour amid new images coming in tonight after that violent police takedown. police seen beating an unarmed man after police say he would not sit down. you saw some of those images last night here, and now, we see what happened in the moments right before. tonight, the new body cam images, and major questions about previous cases involving the same police department in mesa, arizona. and moments ago, we heard from the man who was beaten for the first time. here s abc s whit johnson. dude, they told you to sit your [ bleep ] down. reporter: tonight, growing calls for an independent investigation of the mesa, arizona, police department. have a seat.