An American couple living in Uganda accused of torturing their 10-year-old foster child could face the death penalty if convicted of their latest charge, prosecutors said. Nicholas Spencer and Mackenzie Leigh Mathias Spencer, both 32, were arrested and charged earlier this month with aggravated torture, which carries a life sentence if convicted, for alleged abuse spanning two years. This week, they were also charged with aggravated child trafficking, which carries the death sentence if convicted, Joan Keko, an attorney with the Ugandan state prosecutor's office, confirmed to ABC News.