A former US military worker allegedly confessed to stabbing his girlfriend to death in a chilling call with a 911 dispatcher Friday. “Um, I murdered my girlfriend,” Kyle Sanchez, 35, allegedly told a police operator from the couple’s Tampa, Florida, home at around 3 p.m., according to court documents obtained by local news outlet WFLA 8 . Sanchez – who had top-secret security clearance while working as a data analyst at the nearby MacDill Air Force Base until May – also told the dispatcher that