A massive manhunt for murder suspect and former Los Angeles police officer Christopher Jordan Dorner has thus far yielded only his ID, LAPD badge and two confrontations with law enforcement, one of them fatal.

Los Angeles police consider 33-year-old Dorner “armed and extremely dangerous” and have issued a blue alert for several countries in southern California — the highest tactical alert, reports L.A.’s KTTV. On Sunday, Dorner allegedly gunned down college basketball coach Monica Quan and her fiance in an Irvine parking garage before posting a 5,900-word manifesto on his Facebook page, promising more violence for at least 12 police officers and their families.

According to the Los Angeles Times, Quan was the daughter of Randy Quan, a former LAPD officer turned lawyer who represented Dorner at the police hearing that ultimately resulted in his dismissal.

“I will bring unconventional and asymmetrical warfare to those in LAPD uniform whether on or off duty,” Dorner’s manifesto says, before promising to kill any officer who tries to arrest him. “There will be an element of surprise where you work, live, eat, and sleep. . . I never had the opportunity to have a family of my own, I’m terminating yours.”

According to several local news outlets, Dorner served on the LAPD until 2008 before he was fired for making “false statements” about his field training officer, Sgt. Teresa Evans. Dorner claimed Evans kicked a schizophrenic subject in the course of an arrest, KTTV reports.

The station is also reporting that Dorner, a U.S. Navy reservist, served 13 months in Iraq or Afghanistan in 2006, where he was trained as a sniper.

In addition to shooting Quan and her fiance, police believe Dorner opened fire on officers in two separate incidents Thursday morning. In the first incident, police in Corona were checking on an individual named in Dorner’s manifesto when they noticed a gray Nissan Titan pickup truck matching their description of Dorner’s, KABC reports. When they followed the truck, the driver opened fire with a shoulder-weapon, possibly a rifle. One officer was grazed in the head, but his injury is not life-threatening.

Later, Dorner ambushed two officers sitting at a stoplight in Riverside. One died; the other is critically wounded and in surgery, according to KABC.

Police do not know where Dorner is now, though there’s some suggestion that he has tried to leave the country. Dorner’s LAPD badge and an ID were found near the San Diego airport around 2:30 a.m. Thursday.

Luis Gomez, a freelance reporter in L.A., also tweeted shortly after 8 a.m. that the suspect tried to tie up an elderly boat owner and take the boat to Mexico, but ran off when a rope caught in the propeller. That report has not been confirmed.

Sgt. Rudy Lopez told NBC’s LA affiliate that every officer mentioned in Dorner’s manifesto has been provided with police protection. Police are aggressively searching for a gray pickup matching Dorner’s description. KTTV reported that police accidentally shot three people this morning who were driving in similar vehicles. Their injuries are not fatal.

“It’s extremely intense,” Lopez said. “We’re trying to identify where he’s been, where he’s going. In this case, we are the targets. He’s brazen. He’s on a hunt to do whatever havoc he can.”