when their attention turned to casey, he left the building, they followed him outside. >> his friend was being shoved, and pat stepped up, and his intention was to stop a confrontation. >> reporter: and then one of them punched him flat out cold on the cement. >> hopefully by the funeral they've identified people. >> reporter: hours before they leave for new york to go plan a funeral, they wait for detectives to pick up this picture of their son so that it can be put on a reward poster. family members wonder why the poster is needed when there's surveillance video out there. >> since the video existed at that time time of tint, it's taken awhile for it to get to that point. >> reporter: now, as you saw, all of those veteran pictures, this is an afghanistan war veteran who saved many lives. his organs, most of his organs were donate. his parents checked yes on every box. and because of that, hat taken all day for his body to be taken to the medical examiners. because of that, we are unable to get any information from police. we're live in dupont. >> all right, thank you so much, britney. >> leslie. >> a consum