Allegheny County Police Investigating Robberies Of Two Separate 7-Elevens CBS Pittsburgh 3 hrs ago Syndicated Local – CBS Pittsburgh By: KDKA-TV News Staff CASTLE SHANNON (KDKA) – Castle Shannon Police and Allegheny County Police are investigating the robbery of a 7-Eleven/Marathon Station on Mt. Lebanon Boulevard, as well as a 7-Eleven in South Fayette. According to Castle Shannon Police, a Black male wearing a mask and a dark hoodie walked into the store around 3:15 a.m. with a gun and took money from customers in the store, the cash register and ordered everyone onto the floor. He then ran from the scene, getting away with about $380.