Investigators think a car seen on the tape may have been involved.
They say the boy was probably shot by gang members, who fired from a nearby park.
Azehel Crus was hit in the head while playing inside his house just after 6 p.m. Tuesday.
Police went door to door Wednesday, looking for witnesses, but so far, say they have no suspects.
People can call the department's anonymous tip line at 831-775-4222 or text information to the text tip line with code "SPD831" to 847411.
