Authorities say the teen noticed his brother was gone from the front yard of their home before hopping into a car and chasing down the suspect found a mile away.
Records for 20-year-old Ty Maine Miller are painting a pattern of alleged behavior involving luring at least two girls, one after the other.
Police say the 57-year-old man thought he was going to meet a 15-year-old girl to have sex on his boat.
Police say the suspect approached teenagers in a 2014 Black Lexus Sedan, offered them cookies, and asked them to get in his car. When they refused, he drove away.
Police are crediting a little girl's quick thinking and a lesson learned at home for helping her avoid an attempted kidnapping.