Fired Cop Becomes Suspected Cop Killer!

According to published reports former Los Angeles police officer Christopher Dorner is suspected of killing at least three people, one a police officer.  News agencies have reported his online posts accuses officers and police officials of the Los Angeles police department as corrupt and racist.  He claimed to have been a victim of a retaliatory termination after he reported acts of misconduct by another police officer.  According to these published reports, Mr. Dorner  vows to wage war against law enforcement officers and their families.

Are the claims of police misconduct made by Mr. Dorner, possible?  Did the actions of the Los Angeles Police Department push Christopher Dorner into a cycle of irrational actions?  Are the rebuttal statements about police misconduct made by LA police officials specious?