Police released video surveillance footage Saturday that shows missing 8-year-old Sandra Cantu skipping along a neighborhood street the same day she disappeared more than a week ago.
Police were hoping the video might jog someone's memory from March 27, the day she went missing after playing with a friend.
The brief footage shows the little girl with brown eyes and light brown hair swinging her arms as she skips near the mobile home park where she lives. Then she disappears from the frame.
Police have characterized Sandra as a missing person but have not said whether they believe she was abducted. They have not identified any suspects in her disappearance, although they have searched several homes and towed four cars from the mobile home park.
Tracy Police Lt. Jeremy Watney said a man volunteered to talk to investigators Friday.
"We have not ruled anybody out," Watney said. "Everybody is a person of interest."
Meanwhile, hundreds of volunteers continued on Saturday to scour canals and fields near this city of 78,000 about 60 miles east of San Francisco. Search and rescue squads on mounted horses and SUVS were searching a remote area just outside the trailer park.
The city's community emergency response team was coordinating a push by volunteers to circulate 11,000 new fliers with updated photographs of Sandra.
Shakil Ditta, 29, was among nearly 50 volunteers who came to a Tracy Fire Station in a 45-minute span early Saturday to help. He said his daughter reminded him that Sandra had been a kindergarten classmate and a friend.
"It just hit me," Ditta said. "I have an 8-year-old daughter, too."