Police in Louisville, Ky., found a body in a barn behind Churchill Downs on Sunday morning, hours after I'll Have Another won the 138th Kentucky Derby in an upset.
Authorities received a phone call alerting them to the dead body of an unidentified Hispanic male around 5 a.m., a spokeswoman told Reuters.
The man's body was found in barn eight yards from where I'll Have Another was stabled ahead of the Derby.
At this point we don't have anything pointing to the fact that this had any association with Churchill Downs or the Derby itself, said Alicia Smiley, spokeswoman for Louisville Metro Police, according to the AP.
The body was found in a barn owned Angel Montano Sr., according to Smiley. The Louisville trainer was not available for comment.
Police launched a homicide investigation after determining foul play was involved in the death, though a coroner has yet to determine the cause of death.
I'll Have Another, a 15-1 shot, broke late in the Derby on Saturday, coming up at the final furlong to move ahead of favorite Bodemeister.