Where a trespasser lacked a legitimate expectation of privacy in the search of his backpack that contained firearms.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge Jorge L. Alonso.In July 2016, Chicago police officers responded to a report of a residential burglary in progress. After they approached the home and looked for signs of a forced entry, someone named M.G. arrived.M.G. told the …