What do the honorable scholars and respected muftis say about the following issue: If a person stole something and sold that stolen item to another man, and the buyer did not know who the thief was or where he came from, and now the thief has disappeared—then this second man sells the item to a third person. Is it permissible for the third person to purchase that item or not? In detail: A transaction was made for a bicycle which was purchased from a drug addict, and there is a strong suspicion that this bicycle is stolen.
Since the first seller was a drug addict and there was a strong assumption that the bicycle was likely stolen, then in this case it is obligatory upon the buyer to return the bicycle to the seller and take back the amount he paid, and it is necessary to avoid selling this doubtful bicycle onward.