WHYY By 30th Street Station in Philadelphia. (Kimberly Paynter/WHYY) Federal authorities arrested members of a train-based network of straw purchasers in a firearms case that sheds light on the pervasive flow of illegal out-of-state guns into the Philadelphia region. According to a federal complaint, the Bureau of Alcohol, Tobacco, Firearms, and Explosives charged Tyrone Patterson, a North Carolina resident, and Junious Flemming, of New Jersey, with multiple firearms violations. The pair admitted to participating in a “straw buying” operation that relied in part on Amtrak trains to ferry some 40 weapons to Philadelphia and neighboring cities for illegal sales over the past six months.