To become a forensic psychologist you would have a desire to want to help and support offenders. Excellent communication and listening skills will also help you work with a broad range of people including other professionals.
A Seattle University study examining the costs of the death penalty in Washington found that each death penalty case cost an average of $1 million more than a similar case where the death penalty was not sought ($3.07 million, versus $2.01 million).
1 In Maryland death penalty cases cost 3 times more than non-death penalty cases, or $3 million for a single case.  In California the current system costs $137 million per year; it would cost $11.5 million for a system without the death penalty.