How Many Controlled Buys Does It Take? What to Know From Criminal Attorneys in Minneapolis? How many controlled buys does it take? Often, police seek a search warrant after one or more controlled buys. A judge must find probable cause. That means there is a fair chance that drugs or proof of a crime will be found in a place. Read more: https://sites.google.com/view/criminal-lawyer-minnesota/home/criminal-attorneys-minneapolis?