District Attorney Kim Ogg of Harris County, Texas, stated Tuesday that “circumstantial evidence” is needed to prove that a 12-year-old girl was sexually assaulted by a pair of illegal immigrants, who could potentially receive the death penalty.

Franklin Jose Pena Ramos and Johan Jose Rangel Martinez crossed into the United States from Venezuela illegally earlier this year and have been charged with capital murder for the death of Jocelyn Nungaray. Ogg was asked if the two suspects in Nungaray’s murder could receive the death penalty, to which she said Nungaray “endured assault for multiple hours,” calling her last moments of life “unspeakable.”