after months of searching for answers, they say they now have aaron robinson's girlfriend sitting in ing them what happened. according to them, robinson somehow convinced her to help him get rid of the body. >> reporter: the pair allegedly dismembered vanessa's body and covered her remains with concrete. the details so disturbing, her family decides not to tell vanessa's mother exactly what happened. >> reporter: on the day the remains were found, robinson was kept under watch on ft. hood by an unarmed escort. while a case against him was being built. investigators say robinson watched news reports on his cell phone. >> he's watching this on his cell phone. and so he flees. >> reporter: somehow, robinson got past his escort. >> the guard gives chase, but he gets in a vehicle and he leaves ft. hood. >> reporter: robinson managed to obtain a gun. >> he pulls the gun out, and he ends his life. he dies by suicide. >> reporter: cecily aguilar is now in jail, being held without bond. she has pled not guilty to charges relating to helping dispose of vanessa's body. >> with robinson now dead,

investigators say specialist aaron robinson, a suspect in her murder, killed himself as law enforcement tried to take him into custody. >> the tragic death of vanessa guillen and a rash of other challenges at ft. hood forced us to take a critical look at our systems, our policies and ourselves. >> reporter: the panel releasing a number of findings determining that serious crimes on and off ft. hood were neither identified nor addressed and that the system in place designed to report and prevent sexual harassment and assault, also known as s.h.a.r.p., is ineffective, noting that the texas base has the highest number of violent crimes, cases of sexual assault and sexual harassment in the army. today, vanessa's family says she should still be alive, but they're proud of the impact her life has had. >> now it's for us to keep on asking for justice to find those who are responsible and keep the investigation going to see who has to be held accountable. >> reporter: the secretary of the army says a new policy on missing soldiers has already been signed. the policy says that a missing soldier