Death Penalty explained
Stricter enforcement of capital punishment does, in fact, deter crime. From 1990 to 2000, the number of murders in the USA decreased as the number of executions increased.
Political analyst William Tucker in the National Review Online states, "The most dramatic decline in murders in the last decade has been precisely in those regions that have had the most executions... Since 1990, [ Texas, Oklahoma, Louisiana and Arkansas] have performed half the nation's executions... [and] murder rates in these states have fallen faster than anywhere else in the country. (Patrick F. Fagan, The Real Root Causes of Violent Crime: The Breakdown of Marriage, Family and Community, The Heritage Foundation, 3/17/95, www.heritage.org )
Maybe The Great One, a.k.a Mark Levin can expound upon this point better than I.