RADNOR >> Police in Radnor are warning parents about a new trend after police say they've arrested an adult for allegedly using Snapchat to sell drugs to children as young as 13. Late Thursday afternoon, police arrested Nathan Twedt, 21, of Rosemont, in connection with the case. Although the final charges on Twedt were still being worked out as of late Thursday, he was expected to be arraigned on various drug charges.