A Schenectady man has been charged after a robbery at a Cricket Wireless in Rotterdam.

Police say Keith Mancini walked into the store around 11 a.m. Tuesday. He allegedly tied an employee's hands behind her back, showed her a knife and demanded money. He fled with an unknown amount of cash. 

Rotterdam police say they were able to track Mancini to Schenectady and arrest him.

"Video surveillance basically was invaluable for this investigation," said Rotterdam Police Lt. William Male. "That's how we tracked his movements, and ultimately, that's how he was ultimately located."

Mancini is facing a number of charges, including criminal possession of a weapon and petit larceny.