At approx. 0036hrs on July 23 2017, SAPD and SAFD units were dispatched to a reported suspicious vehicle in the 8500blk of IH-35 South. Engine 25 and Medic 25 arrived with SAPD units and found 30+ people in the back of a Semi trailer, with multiple DOA’s. A Mass Casualty Incident was quickly declared and a Medical Taskforce was dispatched. EN25 had initial IC and quickly started triaging the injured while SAFD Central Alarm was directing medical units, the STRAC TXEMS-TF7 Bus, Airlife and coordinating with area hospitals to take the injured. In total, there were approximately 38 patients, with 8 being triage level black, 20 red’s and yellow’s and 10 green. 1 Pt. was flown by Airlife, and the 10 green were taken by the Ambus; the 20 others were transported by ground units to SAMMC, University Hospital, South West General, Mission Trails, Metropolitan Methodist, Nix and North Central Baptist. The incident is believed to center around human trafficking, with the youngest two victims being school aged and the others in the 20’s and 30’s. Homeland Security, ICE and local agencies are investigating. SAPD did have one person of interest in custody. Companies on the ticket were EN25, M25, M50, M36, M33, M09, M10, M06, M05, M08, M22, MSOU01, M15, M13, M16, M44, M19, TK36, PL11, HR11, MedDirec1, EMS-TF7, MOF3, MOF4, BC02, and the Fire Shift Commander.