Ex-UFC star reveals surprising link to the suspect of Vegas Cybertruck explosion

"13 years ago I competed in a shooting competition on History Channel called 'The Ultimate Soldiers Challenge.' My partner in this competition was Matt Burg (aka Matt Livelsberger). Last night when I saw old photos of him on the news, I put together that it was the same guy."

"He was a sincere, hard-working, talented, and competent Special Forces operator. I am flabbergasted and heartbroken to hear the news," he continued. "None of this makes sense and I, like many others, are confused and want answers." 

Police said Livelsberger, 37, was shot in the head in what police believe was a self-inflicted gunshot prior to the detonation of the vehicle. He was identified by his tattoos, credit cards and a military identification found with him. 

Livelsberger was a U.S. Army special operations soldier who had several addresses associated with him and was on leave from Germany, where he was serving with the 10th Special Forces Group.

Fox News' Stepheny Price contributed to this report.