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HOUSTON — <\/span>A federal prosecutor says tests on \u201ca white crystal-like substance\u201d found inside the van of a man shot to death<\/a> by immigration officers in Houston last month showed the material was not methamphetamine. <\/p>\n U.S. Attorney Aaron Reitz confirmed the tests were negative for meth in a statement to The Texas Tribune, the news organization reported Thursday. <\/p>\n Reitz did not say what the substance actually was, but an attorney for Lorenzo Salgado Araujo’s family has said it was a homemade electrolyte mixture that Salgado Araujo and his construction crew used to stay hydrated in the grueling summer heat. <\/p>\n Salgado Araujo, 52, was killed July 7 when U.S. Immigration and Customs Enforcement officers in unmarked vehicles chased his white work van through the streets of Houston, then shot him through the window<\/a>. He had been driving his work crew, including his brother, to a construction site.<\/p>\n Salgado Araujo was a Mexican national who lived without legal status in the U.S. for 35 years, ran a homebuilding business and had never been in trouble with the law. <\/p>\n His death is one of at least 10<\/a> during immigration enforcement operations since the start of President Donald Trump\u2019s mass deportation campaign, sparking protests<\/a> in Houston and calls for an independent investigation.<\/a><\/p>\n Shortly after the shooting, the Department of Homeland Security said Salgado Araujo had \u201cweaponized his vehicle in an attempt to run over an ICE law enforcement officer,\u201d and that the officer had fired in self-defense. The FBI then executed a search warrant<\/a> on the van, alleging that officers saw several small bags inside filled with a substance that appeared to be methamphetamine.<\/p>\n