Marcos Lucero, 35, and Irene Garcia, 33, were in an Ector County district courtroom Thursady for separate pre-trial hearings. Lucero and Garcia have been charged with manslaughter for a June incident that killed Lupita Martinez.
According to the indictments, Lucero and Garcia gave the teenager a lethal amount of alcohol. The suspects were arrested in early October.
Trial dates have not been set.