Well a friend of his has actually came forward and said exactly that -- or at the least that Cosmo claimed to have "an IQ of around 158".
[FONT=&]"A friend of DiNardos told Heavy.com that six or seven months before his arrest, though another source said the injury occurred closer to November 2016, DiNardo suffered a head injury following a quad biking accident. The friend said that DiNardo was stranded in the woods alone for around a day and a half with injuries, including broken bones and bleeding on his brain. As a result of the accident DiNardo had frontal lobe damage. The friend said that sometime after the accident, DiNardo began using
K2, a synthetic marijuana drug."
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[FONT=&]"Later, the same friend told Heavy.com that DiNardo had an IQ of around 158. The source said, [DiNardo] is extremely smart and deceptive and knows his way around forensic data."[/FONT]
https://heavy.com/news/2017/07/cosmo-dinardo-bensalem-bucks-county-missing/