Interesting...
Who said there was a massive amount of blood on the clothing?. Who said there was any blood on the clothing? LE claimed they have a reason to believe she was harmed, but there could be several reasons to make that claim.
Perhaps they found a gun with a bullet discharged. Maybe a knife he had with small amounts of blood on it. "Harmed" doesn't mean "murdered".
If there was blood on the clothing, that doesn't prove she was murdered. Yes, there are cases in which enough blood is collected at a crime scene to conclude someone could not possibly sustain life, along with other types of circumstantial evidence to prove there was a murder. I don't believe a bra and a pair of stockings would hold enough blood to prove someone was murdered, even if they were saturated, but I may be wrong.
I'm not saying I believe she is still alive, but by the same token, as far as I know, there's no evidence she's dead.