For Tustin Police Officer Estela Silva, her life and her foray into law enforcement have been marked constantly with challenges. But Silva, who stands 5 feet tall, hasn’t shied away from any of them. She spent her teen years living in a group home in a low-income neighborhood in Santa Ana, a situation that could have led to bad choices. The environment was structured and disciplined, though, Silva said, which wound up being a good thing. While living in the group home, Silva was influenced by her house father, who was a police services officer at Tustin Police Department. “He…