Ever get that sinking feeling when you realize you've lost your cell phone? That's what happened to Carlos Williams, after he allegedly robbed a bank.

Police say Williams left two huge clues at the scene of a bank robbery in Frederick in May: his cell phone and his wallet. The items were sitting on the bank counter.

The wallet led to an address in Alexandria, Virginia, but Williams was able to elude capture. And he was apparently undeterred by his mistake. Police say he committed a similar robbery Tuesday at a bank in Libertytown. Investigators knew immediately who was responsible.

The 28-year-old Williams and his 37-year-old girlfriend, Denise Smith, were arrested Thursday in District Heights, where they live. Police say they recovered a BB gun used in the robberies and some of the cash.