A Pine Bluff woman is behind bars after a store clerk accused her of trying to spend fake money. Police say Tamar Tyler, 25, was shopping at the Wal-Mart Supercenter in Pine Bluff when a store clerk noticed two $5 bills had identical serial numbers. The clerk notified police who arrested Tyler. She`s being held in the Jefferson County Jail without bond. Tyler says she got the bogus bills after cashing her check. Police notified the Secret Service which is standard procedure in counterfeiting cases. Police are also investigating whether Tyler is part of a counterfeiting ring.