My brother is into drugs and using the needle lying and stealing and blaming me for his faults?

it's been going on for some time now and its getting worse i cant take it getting blames for his wrong doings our mother had recentlyped away and its only gotten worse he is on probation but everyone thinks he is inocent, only if they knew well he has done alot of stealing for our father and family and blames me and that is one thing i cant stand is lyers and thefts well me and my son are staying mwith my father to help him out and to get thrue the loss of my mother and his wife, but i believe its only hurting me because my brother isnt around for him to see the true side of him it seems like all ive been doind is trying to do my best get back to work and live my life without my best friend mom being here and it seems like i cant win for losing with my brother stealing money from our dad tools ect, and he blames it all on me when i have proof of some items that were taken back ect, then he tells family friends ect, lies to make me look bad and make him look good, how do i stop this i need some advice because i have a child and i am doing everything i can to help others do my best get back on my feet ect and he has given me 2 breakdowns along with my dad because my brother is older and my dad and brother have always been closer than me and my dad, and he sticks up for my brother i cant take the pain and being accused i wished i can prove that im not the bad person i almost want to get my brother with slander because everything hes doing hes telling evryone im doing and im not i cant take it so if you have any answers please help me out.. thank you so much