Thank you for your input. One of the reasons the system has gotten so soft on juvenile crime is because of the belief that no human brain's frontal lobe is fully developed before age 25. I don't believe that is true. And here are my reasons why:
1. The scan used to determine whether certain regions of the brain are fully developed is a Magnetic Resonance Imaging (MRI) scan. There are eight billion people on this planet, and only 100 million to 150 million people get MRI scans each year. That's less than two percent of the global population. So I don't think we know as much about the brain as we think we do.
2. Educational psychologist Jane M. Healy, who has written several excellent books including "Endangered Minds" and "Failure To Connect", says that human brains are physically shaped by experience. So the more frequently you use a certain region of the brain, the faster it matures. That means it's possible for some human brains to have fully developed frontal lobes before turning 25, and it's also possible for some human brains not to have fully developed frontal lobes until many years past age 25-if ever.
Based on these two facts, I believe there are people under age 25 with fully developed frontal lobes, and I believe these need to be found and studied so we can understand why their frontal lobes developed ahead of schedule.
One last thing. Only murderers should get the death penalty. There are several people in past centuries who were executed even though they never took any lives, such as Anne Boleyn, Marie Antoinette, Lady Jane Grey, and Thomas More.