An explosion which killed a plumber may have been the result of using drugs at work. He had arrived at work with an apparent hangover. Co-workers had not seen him very much that day because he had reportedly spent most of the shift in an enclosed van. An explosion in the van caused second and third degree burns to 90 per cent of his body. An oxy-acetylene torch with an open valve, an oxy-acetylene tank with an open regulator and an open tank of gasoline were found in the van. It is assumed the torch set off an explosion of gasoline vapors. […]