Authorities reached out to the public Thursday for help in identifying and tracking down the assailants responsible for shootings that left two youths dead and two others badly wounded over the last eight months in National City. The first of the two firearm assaults took place in the 1800 block of East 17th Street about 11:30 p.m. Oct. 28, according to the National City Police Department. Patrol officers arrived in the area to find Edwin Barrera, 18, and 16- year-old Gillian Aguilera wounded by gunfire. The victims, who had been attending a Halloween party in the area prior to the shooting, were pronounced dead at hospitals, NCPD Detective Sgt. Roberto Gonzales said. Police believe that there are witnesses to the slayings who have not come forward to report what they saw. MORE: https://www.cbs8.com/article/news/local/police-seek-tips-in-unsolved-shootings/509-b0c380ac-01b7-4c8c-9868-0340d2c40a3d