another update:
so i accidentally found out the person's name who was trying to sell it at that store, and i couldn't remember his name for a day or two, until this morning as soon as i woke up i remembered his last name, so i googled him, and the first link to come up was an article online from the local newspaper 2 years ago, this same guy was being arrested for possession and intent to sell marijuana at his high school. his story that he told the police was that he bought the bike from someone in the gas station in town, and he decided to sell it.
when i was at the police station the day i got the bike back, the officer said that he contacted this guy, and told him that he needed to come in for questioning, and if he didn't that he would have a warrant out for his arrest. the officer wasn't playing around!