Police allege the suspects discarded the 18-year-old's cellphone and clothing after his death at Lake Ray Hubbard.
This is not the first Ironman athlete to die during the same competition.
Ryan Jennings, a beloved coach and father from Maine, died while rescuing his children from rip currents during a family vacation in South Florida.
Around 1:20 p.m., deputies got a report of a possible drowning involving a man near the Cheek Road bridge.
A mother is speaking out on her rescue efforts after her twin sons died after falling into an icy pond.
A diver located the body of the young girl about half a mile north of the child's last known location. A large wave pulled the father and daughter into the ocean on Friday, authorities said.