The first trainer of the legendary Mixed Martial Art's fighter "Kimo".
Lost to Keith Hackney at the Ultimate Fighting Championships 4 on December 16, 1994.
Retired following a defeat to Jukei Nakajima at PRIDE on July 20, 2002.
Failed in his attempt to capture the PRIDE World Fighting Championship losing to Yusuke Iamua on February 22, 2002.
He made his third attempt to capture a world title but lost to Brazil's Joe Moreira at Pankration 2 Championships on April 12, 2002.
Was arrested in Los Angeles in May 2008. Plead guilty to felony vandalism. As part of his plea agreement, Joe had to submit a DNA sample.
In October 2008, his DNA sample was matched against an unsolved rape from 1990. Due to the seriousness of the crime, he faces up to a 275 year sentence. On 24 August 2011, he was convicted of torture in the rape case. The rape charges had exceeded the statute of limitations and could not be brought to trial.
As of September 2011, sentenced to life in prison without the possibility of parole after being convicted of torture of a 19-year old woman in 1990. By the time the criminal trial occurred, the statute of limitation for rape had elapsed, therefore the original charge was changed to torture instead. Son's co-defendant, Santiago Lopez Gaitan, pleaded guilty in January, and was sentenced to 17 years and 4 months in prison.
Shortly after being incarcerated he murdered his cell mate. At his trial, he was sentenced to an additional 27 years in prison on top of the 7 to life he was serving for the torture conviction.