Lawrence W. Sherman (born October 25, 1949) is an American experimental criminologist and police educator who is the founder of evidence-based policing. Sherman's use of randomized controlled experiments to study deterrence and crime prevention has led him to examine such wide-ranging issues as domestic violence, saturation patrol, gun violence, crack houses, and reintegrative shaming. He has collaborated with over 30 police and justice agencies around the world, and been credited as a key founder of the field of experimental criminology. -from Wikipedia