Worried about my husband

Alright glow sooo My husband has a past and his past was filled with drugs , Gangs , Robbery etc . But hes a changed man now . He recently bought a phone because i wanted him to have a phone so i can talk to him and text him , Well recently just today his friend text him , and they were talking about “low risk , high reward” and im thinking like what is going on . What are they talking about , then his friend mentions that he would send us computers ... im like oh my gosh idk about that because what if they are stolen .... 🥺 i honestly hope my husband isnt resorting back to his old ways , he said he would fix the issue with his so called “brother” then on top of that my husband had the nerve to ask me was i doing meth ... i said No . Because i dont do that never have never will, i barely smoke ... 🤦🏽‍♀️ My husband smokes marijuanna and cigarettes . . i just Want him to Be okay and to not resort back to his old life , What are some things i can do as his wife to make sure nothing like that happens ?