The death penalty: pro and contra. What's your ideas?

The death penalty: pro and contra. What's your ideas?
139 countries around the world see the death penalty as an unjust form of punishment and Canada is not an exception. But there are some people who are against it speaking about its immorality.
There are a number of different methods in which the death penalty is carried out, current methods include; electrocution, decapitation, shooting (by firing squad), and then the most common being lethal injection. When death by execution was first used, methods included; burning, crucifixion, crushing or dismemberment. Grounds for when the death penalty was first imposed were for when the crimes of murder, treason, espionage or extreme sexual crimes had been committed.
Wrongful convictions have always been a key concern when a criminal is sentenced to death. There is always the possibility that the 'offender has not actually committed the crime that he/she has been put on trial for. For many that believe the death penalty should be abolished around the world, this is one of their most common arguments. That the wrongfully convicted should not have to pay for the mistakes of the police and the mistakes of the government with their lives.
Many believe that in imposing and using the death penalty we are no better than the criminals themselves, in other words, an eye for an eye does not make it right. Although, not sentencing murderers to death row, which could be morally right, the victims and their families have to live with the fact that these criminals are still alive and have to potential to be released and or escape from prison.
There will always be the question of cost when it comes to the death penalty versus life in prison. It is notably cheaper to enforce the death penalty rather than having an inmate sentenced to life in prison without the chance of parole. As of 2009 it costs approximately $109,699 to keep one male inmate incarcerated for one year.
I strongly feel that the death penalty should be reinstated in every province. In seeking justice for crimes the families of those who were murdered will not have to worry about whether or not the criminals will ever be released and or escape from prison. Many prisoners that are serving 25 year sentences are eligible for parole after 15 years, this puts fear in the victims and witnesses that have testified against criminals, victims fear that they will be attacked again or even killed if that given offender is released back into the community.