My vulnerable friend is being dragged into a bad situation

my friend she just broke up wiht her ex and obviously shes vulnerable and looking for attention. she got herself involved with a drug dealer which also does fraud. i cant change her mind about him and cant be found out that im doing something against him so i was wondering what i could do and how to do it to get rid of him as im in the UK and shes in Czech. idc if its ethical or not i care abt her a lot