Timely thread. This week's Craptower study deals with this very thing:
14. Regarding help received through prayer, consider the example of three prison inmates who came to a knowledge of Bible truth while incarcerated and became unbaptized publishers. Because of a violent incident, a number of privileges were taken away from all the prisoners in the facility. That sparked a protest. The prisoners decided that after breakfast the next morning, as an act of defiance, they would refuse to return their plates. The three unbaptized publishers were now in a dilemma. If they joined in the revolt, they would be violating Jehovah's counsel found at Romans 13:1. If they did not join in, they could expect reprisals from angry inmates. 15. Unable to communicate with one another, the three men prayed for wisdom. The following morning, all three found that they had decided on exactly the same solution-they simply would decline breakfast. When the guards later came to collect the plates, the three men had none to return. How glad they were that the "Hearer of prayer" was near!-Ps. 65:2
For myself, I think the majority of these serial killers are looking for someone----anyone----to absolve them of their horrific crimes. Since the Penal System clearly won't let them go free, they turn to religion. Think about it: If you're facing life in prison with no chance of ever getting out, you've nowhere to run and are forced to face the music you've composed. With absolutely nothing to lose and being told that to be forgiven for their horrific crimes, they simply have to accept Ja-E-sus! as their Savior, it is not surprising that alot of them suddenly become Born Again Christians. It fulfills a number of things: They view it as an absolution for what they've done and is their Get Out of Jail Free card. What could be easier?
While it is ultimately God who is the judge of what is truly in their hearts, I think the majority of these people are adapt at conning people and are using the last trick available to them while they still can: religion.