I understand the feeling.
We do not know what they were told. We know nothing at all about what has gone on with the young man except that he returned alone and lawyer-ed up. Admittedly a poor look for him, but again, we know nothing more than what I just said.
I cannot imagine what her parents are going through; never lost child. His parents may well lose their son as well, either through suicide or possibly through conviction of a crime. Assuming they knew the young lady and not completely heartless a-holes, they have to be grieving as well for her loss. He did not seem to be a bad sort, based on the one videoed interaction with the police and no one has come out of the woodwork with bad stories. But regardless of what comes out in terms of his possibly being innocent of any harm to her (I doubt he is does not have some culpability, but again, I do not know) his life going forward is going to be tough. Most everyone right now wants to take him to the nearest tree and hang him.