you notice she was carry with an empty chamber as she racked the slide an instant before moving forward and to the right to clear the woman and child fleeing to the right behind him !! since there is no sound we don't know if any commands were given but I don't think so because he didn't react to it if she did .. no reaction from him till the first shot then the surprised look on his face as the 2nd and third shot is fired into his chest as he fell backwards !!
She's an off duty cop, I imagine she DID yell commands to him. At :28-33, I see him talking to her (probably begging her not to shoot him again), so I assume she's talking to him.
Alot of Countries require carrying on an empty chamber. Israel is the same way. I think it's a good idea, as they have proven, in Israel, that racking and shooting is just as fast and ALOT safer. ALL depends on what you practice.
Btw, she did NOT wait for the Mom and daughter to move. When she took her 1st( and 2nd) shot, the Mom and daughter were in the line of fire. Luckily the bullets didn't go through the BG and strike them. Too many folks here (USA) carry too hot of loads, that over penetrate. Like the saying goes," Every bullet has a lawyer attached to it". Why I carry Glaser Safety Slugs (best I can do- it will show in court that I'm conscious about harming an innocent bystander- those that carry vicious, meat grinding, HP rounds, need to think about that, a AG/DA will use that against you) and highly hesitate to shoot in a crowd.
Also, too bad , she took cover behind the car, but then they got in and took off.