Need urgent help

My aunt is a cannibalistic, I won’t go into details it never bothered me until I left my dog with her for a month because I had to leave to UAE for some personal reasons. After I came back she said she lost my dog and he ran away I was devastated I was so mad at her but then I saw my dogs paw lying in my room. Literally cut off I don’t know what to do or whom to tell any legal actions I could do I don’t have much proof.