david mcmannis was his helper.arned that barr use his business as a cover for stealing from the homes of unsuspecting customers. and here's what happened, said the state, that 1st of october, 2001. towers landlord asked for barr repair estimate. barr and his helper mcmannis began their work day by smoking crack. around noon, for hours before verona cartwright home from school, the men most likely knocked on the door and tara let them in. unaware they had a robbery, not work, on their minds. >> dave mcmannis was taking the property while barr was couldn't 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 to people with impaired minds do things that normal people wouldn't do. and their solution to that was to kill her. >> the woman who had 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