What can i do?????????

i am 15. i have a job with a local business. About a week ago my uncle lost his home and my aunt his wife moved into my cousins house. my uncle has been working as a tow truck driver to try and support his family. but as the few days he has been here have passed it is now very clear why he lost his job and his home. He is not one of the brightest human beings, i hve reason to believe he is using drugs as i have smelled marijuana and something that smells like burnt rubber which i think is cocaine because i found a spoon with white powder residue behind the toilet. he also is a greedy thieve and a sociopath. he steals food from our cupboards and fridge. i gues today between O,dark thirty and 6 a.m he took 3 loaves of bread 4 apples and a 24 pack of beer for the fridge. he also likes manipulate and humiliate his druggie friends so he can steal their stashes of weed or other things while they are loaded... how do i know??? he tells us stories at the diner table and he eats more than the entire family put together. and the worst part is he does not pay rent.he lives here for free. when my mom tried to get him to pay rent ..he made a excuse saying he had no money. my parent were thinking of kicking him out but they do not want to hurt his feelings ..i mean we feel sorry for him because he lost his home but he is also obnoxious and greedy and he is becoming a real burden ...especially when he parks his loud 1999 ford pickup and blasts loud mexican music and smokes pot at 4 a.m ......what should we do about him?