I don't believe he's innocent, I think it's far too unlikely that so many people would conspire to incriminate Watson. But the "inherent and unspoken threat" thing is bull. Or at least, it could be. She doesn't really explain that part, unless that's found in other pieces. Is the "inherent and unspoken threat" solely that he's a "
big, stwong, scawy man 
", or he was holding a blade toward her with a raised eyebrow and tilted head when she resisted, or somewhere in between? Big difference.
Honest question as I haven't read a whole lot about the victims' reports: have any of these people claimed that they told him to stop, or tried to leave?