Musk had earlier provoked condemnation after tweeting that the Thai rescue chief, who had declined the submarine prototype offer, was not really in charge of the operation.
Now that all 12 boys have been safely recovered, one of the rescuers involved, Vern Unsworth, has slammed Musk's involvement as "a PR stunt".
"It just had absolutely no chance of working", Unsworth told CNN. "He had no conception of what the cave passage was like". "The submarine, I believe was about five, six feet long".
Musk replied on Twitter, saying he never saw the diver at the rescue site and promised his sub would make it all the way in. "Only people in sight were the Thai navy/army guys, who were great".
"I thought they had it in hand & only agreed to help when Thai SEAL died (deep cave pumps not operating at time)", Musk said. Musk went on to publicly challenge Unsworth to provide video from the final rescue proving he was there, before rescinding that challenge in favor of one for himself.
If you're already acquainted with Musk and his weird entanglement with the Thai cave story, you may skip to the end of this report for a fuller accounting of his baseless pedophilia accusations.
Then, three days after the rescue operation was completed, CNN posted an interview with a British spelunker who had helped locate the boys.
The boys got stuck in the cave after wandering in on June 23 after football practice only to find themselves trapped by rising floodwaters.
Update, July 15th, 2018, at 5:30pm ET: Musk has apparently deleted the tweets after they resulted in widespread media coverage (as well as anger and mockery).
An global team of cave-diving experts rescued the group of 12 teenage boys and their coach last week, after they had been stuck in the cave since June 23.
"I was *asked* to help repeatedly", Musk continued in another tweet.
Musk fired back at this claim, saying the former provincial governor was "not the subject matter expert" and sharing his correspondence with leader of the dive rescue team Richard Stanton.