On 11-20-16 at around 10 pm, officers were dispatched to a call of a female pinned between two vehicles in the 1000 block of Nacion Avenue in Chula Vista. The caller was hysterical and dispatch was unable to obtain detailed information. Several officers, including Officer Curtis Chancellor and Officer Casey Rose responded to the call. Officer Chancellor was the first officer to arrive on the scene and saw a female victim , later identified as Ann Krone, lying in the street after having been struck from behind by a vehicle travelling southbound on Nacion Avenue. Krone was standing at the trunk of her parked vehicle when she was struck and pinned between the two vehicles. A family member moved one of the vehicles releasing the victim from the two vehicles. The victim's legs suffered severe trauma , were partially severed and she was losing a large amount of blood from her femoral arteries having been severed. Officer Chancellor immediately placed a tourniquet on her left leg. Officer Rose arrived and placed a tourniquet on the right leg. Officer Rose noticed that Krone was still bleeding and requested two more tourniquets from the arriving fire department personnel. Officer Rose applied a second tourniquet to Krone's right leg while a firefighter applied a second tourniquet to the left leg. This staunched the flow of blood and medical personnel were able to quickly transport Krone to a trauma center where she was stabilized. UCSD trauma surgeon Dr. Gadot credited the application of the tourniquets to saving Krone's life.