PORTLAND, Maine (AP) _ Portland police said Justin DiPietro of Waterville was arrested at 11:15 p.m. July 6 after a police lieutenant saw him grab and push a woman on Spring Street. Officials identified the 25-year-old woman as DiPietro's former girlfriend, and say she wasn't injured.
DiPietro's 20-month-old daughter, Ayla Reynolds, hasn't been seen since she was reported missing Dec. 17, 2011, from DiPietro's mother's home in Waterville, where DiPietro lived at the time.
State police have called the case the biggest criminal investigation in Maine history.
DiPietro could not be reached for comment. His previous cellphone number is no longer in service, and a new number in his name could not be located.
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