The guy was an amazing jazz guitarist.
He started playing at age 21, and was playing professionally a year later.
He didn’t like performing much, though, so before too long he just went into sign painting, making the occasional studio album.
You can find all that from his wiki page, though.
No, what I find cool about him is he out-Yngwie J. Malmsteens Yngwei J. Malmsteen. If you get the chance, listen to him do Cherokee. Blistering scalular licks all over the place. And there are a number of songs where he sweep-picks arpeggios.
…and I thought Yngwie, Frank Gambale, and/or Alvin Lee pioneered all these speed techniques.
You can listen for free here.