Demiris Reid of Nuevo was killed in the Jan. 28 wreck on Cajalco Road

The vehicle driven by Kathleen Hydrusko, 63, was struck when a towed SUV came loose and rolled into oncoming traffic.

Nathan Stipp, 31, was arrested on suspicion of driving under the influence causing injury in the Highway 74 crash.

Mariano Castillo Baltazar, 25, was booked on suspicion of driving under the influence causing injury

The suspect vehicle was described only as a dark-colored Toyota or Honda SUV.

Ryan Rice, 38, of Lake Elsinore died in the crash.

Those killed were from Montebello and Fontana

Firefighters and paramedics were dispatched at 1:31 a.m. to the westbound freeway at La Sierra Avenue.

A Toyota Camry was driving west on the freeway when it merged to the right and collided with a Nissan Sentra that was stopped on the shoulder of the freeway, authorities said.