HOUSTON (KTRK) -- Police found a man's body shot and left for dead in a parking lot last night in southwest Houston.Officers were called out around 8pm to a manufacturing business on Highway 288 and the South Loop near NRG Stadium.The security guard there was lying dead in the parking lot. Police say he had been shot sometime in the past 24 to 48 hours.Police say it looks like his phone was used by someone just before the man was killed.Houston Police Department Sgt. Christopher Hassig said, "It looks his cell phone was used. I haven't checked the phone myself, but it does look like the phone was used. It would be premature for me to say if he made the phone call or somebody else made the phone call and what exactly that phone call said."Police are still working to find a suspect.