Witnesses say the man was driving at about 60 miles per hour when he turned his car on to the pedestrian walkway.
"There were people flying, laying on the ground, tents flying everywhere. If he wanted to kill people, he came on a perfect time, 5 p.m. on a Saturday in the summer in Venice Beach," a witness told CNN.
According to the AP, security footage shows that the man parked by the beach and watched the sunset for several minutes before getting into his car and turning onto the boardwalk. The driver then fled the scene, ditching his car nearby.
Police have identified the one fatality as an Italian woman, Alice Gruppioni, who was 32. Another victim is still in critical condition, and two are in serious condition. Eight more people are still being treated for less serious injuries.