My friend had his account hacked yesterday and we know who did it, anything we can do?

Howdy. Yesterday I was queueing with my friend in draft normals and we called out someone for possibly scripting. His movements and attacks were extremely robotic and perfect with no mistakes. Moving on, he logged in today to find that he's played almost 10 games since yesterday even though he was at work. His account unfriended and blocked me. He's since logged in and refriended me and we're trying to help him change his password for now. We are nearly 100% positive it's the person we accused of scripting from yesterday, as his account has not played since yesterday, and the movements in my friends' recent games are nearly identical to the person from yesterdays. Is there anyway I can report this person other than just through the game?