in august, 22 people were killed at this walmart in el paso. the company has since added armed guards to all its stores in that city. it s not clear tonight if walmart had extra security measures in place at this store in arkansas. david. steve all right, steve, thank you. tonight, officials are calling it an assassination attempt. a man taking aim at officers in two separate locations. two officers shot. tonight s surveillance showing that shooter walking into a police precinct and wounding one officer. here s abc s gio benitez tonight. reporter: this is the chilling surveillance video. the gunman calmly walking into this bronx police precinct on sunday morning. moments later drawing his gun. an officer ducks for cover as gunfire rings out. the suspect runs into another room, emptying his entire clip. striking a lieutenant in the arm and then dropping to the ground. more than a dozen officers swarmed the suspect, one