Last modified: Sunday, July 1, 2007 12:48 AM EDT He can run, but not hide BY TED NESI SUN CHRONICLE STAFF REHOBOTH - An overprotective grandmother inadvertently blew her grandson's cover Friday night as he led officers down Route 44 on a high-speed chase through rush-hour traffic, police say. Rehoboth Police Officer Paul McGovern was out on routine patrol at 6 p.m. Friday, when a blue-and-white motorcycle traveling in the breakdown lane zipped past other vehicles at the intersection of Route 44 and New Street. The 17-year-old then lifted his front tire off the ground, McGovern said, and sped up to more than 100 mph. McGovern switched on his squad car's siren and started to chase the young driver, who continued to barrel ahead toward Taunton. After three miles, however, McGovern was forced to let him go due to heavy traffic. But McGovern wasn't the only one who had noticed the teenage speed demon. It turns out that a friend of the young man's grandmother had seen the chase in progress. She recognized the eye-catching blue-and-white motorcycle, and called her friend to inform her about her grandson's exploits. Grandma, deeply concerned, called Rehoboth police - and demanded that they cease chasing her son, admonishing them for putting his life in danger, Sgt. James Medeiros recalled Saturday. Police asked the woman for her grandson's name, which she gave, thus tipping them off to the motorcycle's driver. Meanwhile, Dighton police had also heard about the chase. Recognizing the motorcycle, they called the Rehoboth station and confirmed that the driver was the caller's grandson, a Dighton resident whom police had encountered previously. McGovern called the driver's house, and told him to come to the police station. At 7:30 the teenager arrived - accompanied by his mother - and admitted, police said, that he was the driver who had led McGovern on the dangerous high-speed chase down Route 44. Police hit the operator with four charges: Failure to stop for a police officer; negligent operation of a motor vehicle; speeding; and a passing violation. Police were not releasing the youth's name.