San Jose police arrested 27-year-old Campbell resident Monica Johnson early Monday morning on suspicion of drinking and driving and vehicular manslaughter after her friend, 26, was killed in front of a home in Willow Glen.
That friend has been identified as Cassandra Rose Buck of Los Angeles.
A neighbor on Weibel Way called police just after 2:30 a.m. because they heard the accident and someone crying. A silver SUV was still at the scene - 1600 Hamilton Place - early Monday. The vehicle looked like it had backed into a garage.
One neighbor, James McGraw, told NBC Bay Area that he heard one woman saying, "Follow me, c'mon, c'mon." He wasn't sure if one woman was trying to help her friend back into the garage.
There were beer cans at the scene.
Johnson was booked on charges of DUI and vehicular manslaughter.
Buck's death marks the 21st pedestrian killed this year in San Jose, and the 34th traffic fatality.
On Friday, three teens were orphaned on the Peninsula when Marjorie Reitzell of Redwood City - whom police arrested on charges of drunk driving - killed Balbir Singh and Kamal Kaur, both in their 50s, while they were out walking their dog Thursday evening in Menlo Park.