Suspected paedophile on facebook?

[chris breezyyy]

I think this guy is paedophile..heres the story. There is this deaf girl in my school,she is in 4th year she is 15 or 16 lets call her jess(not real name) im in 6th year. This girl is very hyper always trying to get attention from boys seems harsh but its true because she tried to get my attention in the past.

Anyway she added me on facebook and i accept it. Then i saw her profile and you know typical profile she has pictures of herself but to my surprise there is this one guy lets call him Pete who has his picture on her wall.This guy also comments 'your sexy i mean it" on her pictures. I found out on the status that they are in relationship and he is 25 YEARS OLD!!!? I checked petes profile and he is unemployed i think, and a overweight. In his wall there is this girl lets call her 'Xu' posted " why did you poke me?" He replied "just did hows thing"
And no reply. I checked Xu's facebook. She is from England, 14 years old and had recently had surgery. In her wall she posted on her status "A 27 year old man tryin to chat me on my inbox.hhaha next saville".....And I was Like HOLY Sh1t A PEADOPHILE!!!!!.

I told this to my close friend and my one brother and they were like XO. I'm actually worried about jess and U don't think her parents know what she is doing?....What should I do. Report? How? What do i do. I'm closely monitoring this guy to be honest.
I live in Ireland..