A former employee of the Sag Harbor 7-Eleven was arrested Friday afternoon and charged with stealing $1,085 from the store’s cash register. The theft occurred on Aug. 10 and was followed by a month-long investigation. Sag Harbor police said Bernard T. Cooks of Bridgehampton, 33, had been captured on video taking bills from the register, stuffing them into a plastic bag, and tossing the bag into the garbage. He is said to have done this twice. He later went to the garbage and removed the money, according to police. Mr. Cooks has multiple felonies on his record. He was convicted a few years ago of drug-dealing, although that conviction was vacated due to concerns about irregularities in the arresting officer’s procedures. He was arraigned on a felony charge of grand larceny in Sag Harbor Village Justice Court following his latest arrest. Justice Andrea Schiavoni ordered him to the county jail in Yaphank, where he is being held, without setting bail. Under state law, a local justice is not allowed to set bail for a defendant who has two or more felony convictions.