[piroque]

"It is common knowledge among law enforcement that drug traffickers steal from each other while masquerading as law-enforcement officers, including SWAT units."

Sounds like he knew that he couldn't trust the police ,

[donna]

So, the smart and logical thing for him to do was to point a gun at cops?

Read the article. He was likely expecting an attack from rival criminals.

Man killed by SWAT tied to multiple inquiries
http://www.azcentral.com/news/articles/2011/06/15/20110615guerena0615.html