Test results were negative for human remains . Sheeran died in 2003 . The first blood samples were taken from a Michigan cemetery last week . A tipster said he saw a body buried there a day after Jimmy Hoffa went missing . The union leader 's disappearance 35 years ago caught the public 's imagination .
Test results were negative for human remains . The first blood samples were taken from a Michigan cemetery last week . A tipster said he saw a body buried there a day after Jimmy Hoffa went missing . The union leader 's disappearance 35 years ago caught the public 's imagination .