A judge ruled Wednesday that the boy must stay in juvenile detention during the investigation.
Authorities say the Comal County boy did not have permission to take his father's pickup Monday night. Officers responded to 911 calls about a vehicle being driven erratically on Interstate 10 with its lights off.
Video from the patrol car's dashboard camera shows the pickup weaving in and out of traffic in Fayette County. Officers threw down a spiked strip, which the pickup drove over, to end the 14-mile chase.
The video shows the boy exiting the vehicle with his hands raised and saying he was trying to call his mother.
Nobody was hurt.
