India, Sept. 3 -- Bucks County police in Pennsylvania are searching for an Upper Southampton teenager whose car was found abandoned with a flat tire in Lower Southampton. No one has heard from 18-year-old John Moore since August 30. His car was found by authorities with the driver side door open, left on Old Lincoln Highway across from the entrance to the Penn Valley Terrace mobile home park, police and a family member said, according to phillyburbs.com.

A family member anonymously revealed that no activity has been registered on Moore's cellphone since he vanished. There has been no record of credit or bank card use either. The person added that Moore does not know anyone near the area where his vehicle was recovered.

"He hasn't come h...