TODAY | February 20, 2013
>>> people are dead in a series of shootings and car jackings in southern california . nbc's miguel almaguer have the latest as police continue to search for a motive.
>> reporter: the shooting spree began inside this suburban home an hour outside of los angeles . police say 20-year-old ali sayed gunned down a woman in her 20s as his parents slept upstairs tuesday morning.
>> what the woman was doing inside his home is still under investigation and not known at this time.
>> reporter: the suspect fled the scene , armed with a shotgun. sayed then carjacked a man in a truck, uttering a few chilling words before letting him go.
>> he did approach him and say something to the effect of i killed somebody. today's my last day.
>> reporter: just down the highway, sayed is said to have opened fire on multiple drivers before a second deadly carjacking also in orange county . detectives say 69-year-old melvin ed war wards was orred out of his bmw and then executed.
>> there's no indication of a motive. there's no connection to a conspiracy.
>> reporter: with the suspect on the run, police say sayed shot and killed 26-year-old jeremy lewis in a utility truck. his third carjacking. with police closing in on sayed , investigators say he jumped out of his stolen car and took his own life with the same shotgun he used to kill three others. miguel almaguer, nbc