Family members of Alberto Sierra have testified about his childhood. They described him as a normal kid who enjoyed playing before a significant event occurred. At the age of 12, Sierra was hit by a car, which may have had an impact on his life.

His mother and brother shared their insights into his early life, portraying him as someone who loved to play. Further details about Sierra's life and the events that led to his current situation are available. Sierra is currently facing the death penalty for a triple murder, and the testimonies from his family members provide some background information about his childhood.