Richard Polawski used an ak-47 to ambush and kill three cops while wearing body armor because he feared his guns would be taken away by the Obama administration.
First the obvious lies:
1. Richard Poplawski didn't own an AK-47. He owned a semi-automatic knock off of an AK-47.
2. The first two officers were killed with a shotgun.
Then there is the issue of speculating that Richard Poplawski shot the police officers because he feared his guns would be taken away. This is believable until you realize that he has a history of violence. Particularly violence against authority figures (his drill sergeant and mother). So it's no surprise that he committed another act of violence against 3 authority figures.