Following the death of 12 horses during Churchill Downs' Spring Meet, the Horseracing Integrity and Safety Authority has released a full report of its investigation.The racetrack went dark in June after the 12 horse deaths and moved the remainder of its Spring Meet to Ellis Park in Henderson, Kentucky.Watch in the player below: Equine Medical Director talks ahead of horse racing's return to Churchill Downs On Tuesday, HISA released a 197-page report with its findings after evaluating Churchill Downs.The authority said it evaluated three primary factors:Potential role of Churchill Downs' racetrack surfaces in the breakdownVeterinary records, including the necropsies of each horse that diedAny potential rules violations or procedural deficiencies that may have contributed to the fatalitiesAs a result of their investigation, HISA said that it came to the conclusion that there was not a singular explanation for the fatalities at Churchill. With this in mind, they said there is "urgent need for further action and analysis to mitigate risk stemming from several factors potentially contributing to equine fatalities."HISA had made recommendations for Churchill to implement right after the deaths occurred that could increase the safety for horses. They're now offering further recommendations: A robust data analysis effort in which HISA will work with top data analytics companies to explore critical questions facing the sport. The application of sophisticated data analysis, made possible by uniform reporting requirements under HISA, will yield new, actionable insights into factors contributing to equine fatalities. The creation of a Blue-Ribbon Committee to work toward the study and ultimate introduction of more synthetic surface options in Thoroughbred racing. Improved veterinary screening and diagnostic procedures including: Making PET scans more accessible to racetracks across the country Conducting a research study to examine the causes of exercise-associated sudden deaths Further use of wearable technology as an injury detection tool An examination of whether there are any other equine fitness tools worthy of investment and deployment A racetrack surface expert with HISA, Dennis Moore, also conducted an exam of the main dirt racetrack. Moore tested several factors, including cushion depth, moisture content, surface grades and material composition.He ultimately concluded that the data and information he gathered were consistent with years prior, and there was not any "major issue with the track surface makeup, conditions or maintenance."Moore also concluded that there weren't any medication violations among the 12 horses that died. He did note that there was an increased risk for some of the horses due to the frequency and tempo of their racing and training schedules.This was also consistent with findings from Dr. Alina Vale, who also found that the necropsy reports did not reveal a single contributing factor to the horse deaths.Dr. Susan Stover also noted in the report that there were two horse-related factors in some of the breakdowns. This included horses racing more each year and having fewer rest days in between races.HISA provided a graphic of where each fatality occurred on the track at Churchill. See the graphic below:You can read the full 197-page report and recommendations here.Churchill Downs released the following statement on the report:"We appreciate the diligent investigation and analysis from the team at HISA. We have already implemented several of the recommendations listed in the report as well as additional internal key safety enhancements in time for the opening of our September Meet. Churchill Downs will continue to explore and invest in initiatives that support equine safety as our highest priority."Churchill Downs' September Meet begins on Sept. 14 and runs through Oct. 1.