Man ‘piggybacking’ BART gates leads to gun, drug charges A man who was stopped by BART police after allegedly “piggybacking” the Civic Center station gates behind a paying commuter faces multiple gun and drug charges...Martinez Guillory, 51, allegedly exited the San Francisco BART station gates without paying... After being detained by a BART Police Department officer, court documents said a search of Guillory’s backpack uncovered:9 mm Glock 26 semi-automatic pistolPistol magazine loaded with 17 rounds of ammunitionSuspected heroin (105.3 grams)Cocaine (39.6 grams)Cocaine base (59.4 grams)Packaging materialDigital scaleDA Jenkins announced formal charges Friday, including possession of a firearm by a felon,...