Things to understand about who’s cocaine it could’ve been. The cocaine was found on a routine security sweep without a search warrant. 1600 Pennsylvania Ave. is the Biden family residence. If the cocaine belongs to a family member, it would not be admissible evidence. If it belongs to somebody other than a family member, it would be admissible evidence. Since the investigation quickly ended with no one charged, that seems to imply that it did not belong to an outsider.