As the death penalty in the United States run its course?

Thesis statement:

Does the death penalty serve any purpose in our current judicial system? Criminal executions were first implemented in our society as a crime deterrent; time has shown that cost, errors, and effectiveness have led many to believe there are alternatives available.

Key points:

a? History of capital punishment in America
a? Cost of execution
a? Execution of juvenile offenders
a? Errors in the execution process
a? Pro-death penalty views
a? Alternatives available