Claim: Joseph Boatner led various groups using the "Ink Spots" name until his death May 8, 1999.
Evidence: Boatner died on May 8, 1989 at the age of 70 at the Lakes Region General Hospital in Laconia, New Hampshire. 
May 8, 1989(1989-05-08) (aged 70)
Laconia, New Hampshire, USA