Lancaster City police need your help finding a missing, endangered child. Police say Alexander Ramos-Pacheco from Lancaster has been involved in an online relationship with a 15-year-old girl. Officers say Ramos-Pacheco may have traveled to Chicago to pick up Sheralym Mercado and brought her back to Lancaster sometime between last Thursday and Sunday. Lancaster City police did check with the Chicago Police Department and Mercado was reported missing last Wednesday. Police believe she is in danger. Right now officers are in possession of one of Pacheco’s cars and have spoken to several people who have seen him and the girl over the past few days.