I feel like HR may be different there to here, but here, if harassment of any kind is reported, then it's looked into thoroughly, he can ask for a witness (you'd be a great one in this case) and the truth is pretty much always found out - that manager would be gone. There's actually a hotline victims can call at my work if they need to, so I hope there's something similar there. But yeah, it'd depend if corruption exists and how much of a psycho this manager is. Surely other management have a similar opinion of him.