Orange County sheriff's officials on Tuesday identified the suspect in series of fatal shootings and carjackings as Ali Syed, a 20-year-old community college student with no criminal record.

Authorities don't have a motive for the shootings, which began with the slaying of a woman at Syed's south Orange County home, spread north in a series of random and deadly carjackings, and ended with his suicide in the city of Orange.

Syed was described as an unemployed man who was taking a class at Saddleback College. He had no criminal record and was living with his parents on Red Leaf Lane in Ladera Ranch, sheriff's spokesman Jim Amormino said.

PHOTOS: Shootings at multiple locations in O.C.

Deputies were called to their home about 4:45 a.m. after his parents reported a shooting, Amormino said. Responding deputies found a woman dead inside who had been shot multiple times.

The relationship between the woman and Syed was not yet known, Amormino said, although she was not related to the suspect. The woman has not yet been identified.

Family members, including children, were at the home at the time of the shooting, Amormino said, but no other injuries were reported.

MAP: Orange County shootings

Syed fled the area and headed toward Tustin, where Amormino said "multiple incidents" occurred.

The first, authorities said, occurred near Red Hill Avenue and the 5 Freeway, where authorities received a report of a man with a gun about 5:10 a.m. The suspect attempted a carjacking, Tustin police Lt. Paul Garaven said, opened fire and wounded a bystander.

About five minutes later, the suspect stopped the BMW near the 55 Freeway in Santa Ana, officials said.

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Around that time, authorities also received reports about a man shooting at moving vehicles on the 55 Freeway. Officials believe the man fired either while driving or after he stopped and got out of his vehicle. At least three victims have reported minor injuries or damage to their cars, and investigators asked that others who believe they may have been fired upon to contact police.

Shortly after, another shooting and carjacking was reported on Edinger Avenue near the Micro Center computer store in Tustin, Garaven said. One person was killed and another was taken to a hospital.

Co-workers identified the men as plumbers who were working at the under-construction Fairfield Inn on Edinger Avenue.

Officers spotted the suspect in a stolen vehicle, followed him into the city of Orange and initiated a traffic stop near the intersection of East Katella Avenue and North Wanda Road, Garaven said.

The suspect then shot and killed himself, authorities said. A shotgun was recovered, but officials said other weapons might have been involved earlier.

In Orange, financial planner Kenneth Caplin said he had a clear view of the gruesome drama that unfolded Tuesday on the street outside his office.