Ric Flair's stepson, Sebastian Kidder, sent a message to his father just before he died by suicide on Saturday, TMZ Sports has learned.
Ryan Winderweedle, a spokesperson for the Gwinnett County Police Dept., shared the heartbreaking detail with us on Monday ... explaining Kidder's biological dad, Paul, told police he received a text from Kidder at around 4 PM -- just before he passed away.
Winderweedle said Paul then placed a 911 call, and Kidder was found dead from a gunshot at the family's home a short time later.