Should I tell my parents my brother smokes weed?

So my brother has started to smoke weed maybe a month ago and I’m tired of covering for him. One time my mom was crying and I told my brother to comfort her after I did because she was crying, and he told me “I can’t I’m high”. He doesn’t care about me anymore and screws me over, and I’m tired of having this dumb secret about him.
Should I tell my parents my brother smokes weed?
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