LANCASTER – Police made an arrest in a shooting last Saturday inside the Crispus Attucks Center at 407 Howard Avenue in Lancaster during a private party. Officers found a 16-year-old male with a gunshot wound to his leg. The victim was transported to Lancaster General for treatment and later released. During their investigation, authorities were able to identify a suspect. 16-year-old Ryan Rivera of Lancaster was arrested without incident last evening in the 200 block of Hazel Street. Rivera is charged with aggravated assault and carrying a firearm without a license. Due to the serious nature of the offense, Rivera is being charged as an adult.