his name was aaron robinson, a 20-year-old combat engineer.obinson's alibi that day? specialist robinson tells us that once he had met with vanessa, that he pretty much was done for the day. and so he actually locked the arms room, and he left for the day. andrea canning (voiceover): robinson's personal id was entered into the security system, indicating he'd left the arms room when he said he did. andrea canning: did he go home? that was his story. he told us he was home for the rest of the evening. and who was he with? cecily aguilar. andrea canning (voiceover): cecily aguilar was robinson's 22-year-old girlfriend, a civilian estranged from her husband. aguilar worked at a local gas station, but had a side business on social media posting racy pictures of herself for quick cash. just to be held. andrea canning (voiceover): reporter jasmin caldwell learned from court records that aguilar told investigators pretty much the same story as robinson's. well, the night of april 22, she was at her home with aaron robinson, didn't know anything about