There have certainly been crimes that have been committed with NFA firearms before, but the dates aren't adding up on the transcripts from the Rudin case between what's been published and what could have been origin date of what was reported as an integrally suppressed .22lr pistol.
"On July 21, 1996, a scuba diver discovered a .22 caliber Ruger handgun while diving near Pyramid Island at Lake Mead. The gun was wrapped in several plastic bags that were secured with rubber bands and so was well preserved. The handgun had a sound suppressor attached to it. Police subsequently learned that the gun had been registered to Ron in 1980. According to records obtained from the Bureau of Alcohol, Tobacco and Firearms, Ron had reported the items missing in October 1988."
GEMTECH wasn't yet founded in 1988.
Kel