very old iExpense pending manger approval

We have some very old iExpense reports which are pending manager approval.   These reports are several years old (5+ years) and we want to delete them but I can't get to them to withdraw &/or delete.  They don't come up on the iExpense page for the end user since they are so old, I can't pull them up under the auditor, I can't pull them up under the manager, and they can't be found in the workflow.  When I run a query to find status of reports they come up there as pending manager approval so I know they are