Bruce Madiar, 62, collapsed in his front yard in the 500 block of Dee Lane, Roselle after he was repeatedly stung by wasps.
Roselle firefighter/paramedics worked with Advanced Life Support for 20 minutes with resuscitation efforts before he was transported to a local hospital.
The case is scheduled for an autopsy with the medical examiner Wednesday to determine the exact cause of death.
Bruce Madiar is a former president of the Ironworkers Union Local 63.
View Larger Map 500 bock of Dee Lane (address not precise).
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