police captain, randy kwan.ainst whom dorner, an ex-lapd officer himself, held a grudge. >> today we've identified christopher jordan dorner as a suspect in this double homicide. >> reporter: 33-year-old dorner, a lieutenant in the u.s. navy reserves honorably discharged just 11 days ago, had been fired in 2009 from the lapd. he threatened individual officers in an eight-page manifesto against the department that he posted online, and wednesday he attempted, unsuccessfully, to hijack a boat in san diego. >> he pointed a handgun at the victim, who is an 81-year-old male, and demanded the boat. >> reporter: then thursday dorner allegedly shot three police officers in riverside county, killing one and wounding the others. 34-year-old riverside officer michael crain, a married father of two, was killed in the attack. police launched the largest manhunt in lapd history, following up on more than 1,000 tips. hundreds of officer crisscrossing the country for days, including efforts in tijuana, mexico, san diego county,