Juan Elias Garcia , who had a $ 100,000 reward on his head , surrendered in Nicaragua . He was sentenced to death and executed by firing squad. A soured romance and gang rivalries are involved , the FBI says .
Juan Elias Garcia , who had a $ 100,000 reward on his head , surrendered in Nicaragua . He 's accused of killing a 19-year-old woman and her 2-year-old son . A soured romance and gang rivalries are involved , the FBI says .