Warrant issued for operator in US collapse A WARRANT has been issued for the arrest of a heavy equipment operator in the collapse of a Philadelphia building onto a thrift store that killed six people, US officials say. Authorities said on Saturday that 42-year-old Sean Benschop will be charged with six counts of involuntary manslaughter, 13 counts of recklessly endangering another person and one count of risking a catastrophe. Police are searching for him. Authorities believe Benschop was using an excavator when the remains of the four-storey building gave way and toppled onto an attached Salvation Army thrift store. Deputy Mayor Everett Gillison said a toxicology report showed evidence that he was high on marijuana. Benschop didn't return a telephone message seeking comment. At least two survivors are suing the demolition contractor and building owner.