Although I agree that Airbnb may not be responsible for the murder of ML, however if you read the attached article about Airbnb you will see that, IMO, they make no (or very little) attempt to protect their guests.
Although police have so far said this (AA) didn’t have a criminal record, we don’t know if there may have been any complaints by any of his previous Airbnb guests that could have been cause for concern and should have gotten him shut down.
Granted, we can’t take what every person speaking publicly right now is legitimate and telling the truth, but just on my quick look at some posts on the last thread there was a comment by a woman who said she had stayed in the basement room and, after her stay, AA sent her a friend request on SM. She said she found it strange and did not accept his request.
I wonder if any previous guests filed complaints or have bad reviews and if Airbnb may have ignored them, thus allowing him to continue to operate. I wouldn’t be surprised if he had cameras throughout the guest area (including the bathroom & shower). I saw one news report that said they spoke with a woman who said she cleaned the property in March and that there were several cameras - including three in the Master Bedroom.