ST LUCIE COUNTYMan asks Walmart clerk for something to help him kill 200Cheryl McCloudcheryl.mccloud@tcpalm.comPolice are trying to identify this manCONTRIBUTED PHOTO BY PORT ST. LUCIE POLICEPolice are trying to identify this manCONTRIBUTED PHOTO BY PORT ST. LUCIE POLICEPolice seeking to identify this manCONTRIBUTED PHOTO BY PORT ST. LUCIE POLICE