At the burglar's house.
In the garage, in a cardboard box labelled
In the old safe with the combination KSP has forgotten.
In the library, in a hollowed-out bible.
In his wife's undies drawer.
Within easy reach of the bed, behind/under the pile of unread books, unheard cds, and old requests for charitable donations.
Loaned to a friend who needed to get rid of some rodents of unusual size.
In a police evidence locker.
Other (please make a suggestion in comments)