Eighty-eight percent of the country's top criminologists do not believe the death penalty acts as a deterrent to homicide, according to a new study published today in Northwestern University School of Law's Journal of Criminal Law and Criminology authored by Professor Michael Radelet, chair of the sociology department at the University of Colorado at Â鶹ӰԺ, and Traci Lacock, an attorney and CU-Â鶹ӰԺ graduate student in sociology.