Lol. You have really have no idea.
For starters: The SUWS-ASR link, while intriguing, means nothing by itself. It's a very common "treatment" itinerary. Second, you haven't proved that Kelly Dunbar of Carlbrook is any relation to or even knows Peter Dunbar. Third, if you'd ever researched within "Classmates" before, you'd know that the dates are notoriously incorrect. Often a high school span (4 years) is slapped on somebody's specs when they've only supplied the graduation date.
Most importantly, you haven't even proved that Michael Dunbar is dead! Where's the obit? That kid is probably alive and well somewhere in Massachusetts while you'll spinning your wheels in the wrong direction!
Sloppy, sloppy, sloppy...