John Vallejos, aged 51, tragically lost his life on October 5, 2011, in a horrific shooting incident at the Lehigh Southwest Cement Permanente Plant in Cupertino, California. Vallejos was one of three victims killed in a rampage carried out by Shareef Allman, a disgruntled employee of the plant. The incident occurred during an early morning meeting to discuss safety issues, where Allman opened fire on his colleagues using a .223-caliber semi-automatic rifle and a .40-caliber handgun. Vallejos, a
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