his dad is a cop, all the talking in the world wont make it better for him. Untill you move out i bet you wont be able to smoke much but your best bet would be smoking with your friends while your out and never at your house. he for sure will be going threw your shit so dont leave anything in your house and clear eyes is your new best friend. If you want somthing in your house your best bet is to buy an eighth or somthing small and get a one hit grind up all your weed and put the one hit and bud in a large highlighter because they are pritty inconspicuous. Problems like this just call for better ideas in order to work. you can think of somthing just be even more carefull and always keep an eye out for the cop known as dad.