man i have been in a situation but instead of a friend killing them, when curing i went out the room and my stash got a whole lot smaller, i noticed straight away, played it dumb, the next day i went to my favourite place brought salvia extract, and a herbal incense called pandora's box, i had quite airy buds so i used a tooth pick, rubbed salvia extract in the cracks, ground up pandoras box, rubbed it all in and invited him round, we played some games as usual, and i racked up the biggest bong he had ever seen
i told him if he can do it in 1 i will give him a quater ounce, well..... somehow he managed 3 quaters, coughes as if he just smoked a oak tree branch, was sick, lyed on the floor, i told him what had happened, and why i did it, i picked him off the floor, struggled to get him out my door and left him on the path outside my house, 20 mins later a ambulance turned up, shipped him in the back and he never messaged me again, i know he is ok now but maybe he will think twice about getting sticky fingers without asking, give it a go, works a treat