Wow, sorry to hear about this UK. What a freakin' scum bag. Hope they catch the SOB and he gets what's coming to him. Repeat offenders in these matter should be executed. There is no such thing as rehabilitation for these pukes.
Sorry to hear this awful news Kat. I hope that your sister is ok after what she's been through. Try to keep a cool head as best as you can and don't do something that you may regret.