knocked on the door and tara let them in, unaware they had robbery not work on their minds. >> dave mcmannisoperty while barr was distracting her in the bathroom. we believe she found out. she heard something or saw something that mr. mcmannis was doing, where he was in a place he shouldn't have been and she confronted him. and two people with impaired minds do things that normal people wouldn't do. and their solution to that was to kill her. >> reporter: the woman who'd been sitting out in the front yard told the jury how the two men had been laughing and joking when they arrived, but later when she saw them backing their truck up to tara's front door breaking that small palm tree in the process. >> it was almost like they had a mission, that they had a plan. and one went straight to the tailgate and put the tailgate down out the truck and the other went -- went straight to the front door. >> all business? >> all business. >> reporter: that, said the prosecutor, is when they cleaned up and took tara's body in a bed sheet, loaded it into the truck, and waited for dark when one or both of the