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Hossein Tabrizi (Courtesy Walnut Creek Police)

The man suspected of driving a pickup truck into a family of four, killing a woman and critically injuring a second, was released from jail Wednesday and no charges have been filed against him.

Walnut Creek resident Hossein Tabrizi, 53, was released from the Martinez jail sometime after 7 p.m. Wednesday, according to an employee at the jail. He had been there since police arrested him on suspicion of vehicular manslaughter after the crash Saturday in front of the Marriott Hotel on North Main Street in Walnut Creek.

The Walnut Creek Police Department has not presented its case to the Contra Costa District Attorney's office, which would determine whether to file criminal charges. Law requires that suspects be released from custody after 72 hours if no charges are filed. Police continue to investigate the crash, including whether drugs or alcohol were a factor, and can submit the case to the district attorney at a later date.

Police said Tabrizi was driving south on North Main Street around 6:15 p.m. Saturday when the red pickup truck he was driving veered off the road and slammed into two of the four people in the group. The truck then became wedged between a streetlight pole and a retaining wall.

Hotel guest Sherry Hicks, a 52-year-old math teacher from Santa Barbara who was visiting her son and his wife, was pronounced dead at the scene. Her daughter-in-law, Sheng Hahn, remained in critical condition late Wednesday at John Muir Medical Center in Walnut Creek.

The other two people were uninjured.

Rick Hurd covers public safety. Contact him at 925-945-4780 and rhurd@bayareanewsgroup.com. Follow him at Twitter.com/3rdERH.