Danielle Pelletier said she never once had to serve a detention when she attended Winslow High School more than two decades ago. But her clean record ended Friday. Pelletier, 39, served her first detention, reporting to Room 24 of the high school promptly at 2:15 p.m. for a one-hour stay. The Vassalboro mother served the time in place of her daughter, who had been given the punishment because of an unexcused absence. Pelletier requested the stand-in arrangement, she said, because she was the one who elected to pull her daughter out of class 30 minutes before the end of the...