An expert believes a thief caught on camera in South Setauket was likely using a cellphone or wireless device to break into cars.

Altice employee Joe De Carlo says security video of his South Setauket home shows a would-be thief breaking into his car and his wife's car early Tuesday morning. De Carlo says the doors on both cars were locked.

A local security systems and law enforcement technology professor says the suspect was most likely using a cellphone or wireless device to break in.

"There are simple inexpensive devices that you can buy from the market or if someone is expert, tech savvy he or she can make it---a wireless transmitter receiver," says Dr. Nazrul Islam, of SUNY Farmingdale.

Dr. Islam says hackers are often finding a way around security systems in cars and in homes.