(AP) — The 18-year-old sister of a man accused of killing four people in and around Omaha in August has been charged with being an accessory in one of the killings.

Lori Sayles waived her preliminary hearing on that and an unrelated charge on Friday.

Prosecutors say Sayles got rid of the murder weapon used to kill 22-year-old Curtis Bradford on Aug. 19. Police say 27-year-old Nikko Jenkins shot Bradford. Jenkins is also charged with three other counts of first-degree murder for the Aug. 11 shooting deaths of 29-year-old Jorge Cajiga-Ruiz and 26-year-old Juan Uribe-Pena and the Aug. 21 shooting death of 33-year-old Andrea Kruger.

Sayles also faces a separate robbery charge from an Aug. 12 incident.