Police Arrest Crane Operator in Philadelphia Collapse Faces charges of involuntary manslaughter in deadly building accident By Ruth Brown, Newser Staff Posted Jun 8, 2013 3:51 PM CDT 138 comments Comments This undated Philadelphia Police photo shows Sean Benschop, who also goes by the name Kary Roberts. (AP Photo/Philadelphia Police) (Newser) – Sean Benschop, the crane operator behind the stick in the Philadelphia building collapse that killed six and injured 14 this week, turned himself in to police today after a warrant was issued for his arrest. Benschop—who may have been high at the time of the accident—will be charged with six counts of involuntary manslaughter, 13 counts of recklessly endangering another person, and one count of risking a catastrophe, reports the Philadelphia Inquirer. Involuntary manslaughter is a first-degree misdemeanor, but the latter is a felony. Benschop has been arrested 11 times and served two prison stints since 1994, with charges including drugs, theft, and possession of weapons, reports the AP.