Strange story. Pretty unusual for a coyote or even a pack of them to attack an adult. Most of the attacks on humans involve children or adults trying to rescue a child or a pet. It hard for me to imagine that a coyote or even two would attempt to take down an adult. When I lived outside Seattle I'd hear them far more often than I'd see them. They kept to the woods line at the edge of the field and were extremely skittish and the ones I did see couldn't have been more than 30 or 40 pounds. We heard stories that they would lure a dog into the woods and gang up on it and kill it but that never happened to ours. Of course they were pretty big dogs, a pointer/dalmation, a big lab, a great dane, and a shepherd cross and they'd run together a lot. Tough as coyotes are, I imagine they would have trouble with that particular pack but as far as I know they never got one. I ran the pointer (good old Fred) behind the car once and clocked him at about 30 so he could move pretty good. He took off after a coyote once and it left him like he was standing still. So that's my limited experience with them. I never even got a shot off at one.
The NE coyotes are bigger, possibly crossed with wolves and weighing up to 70 lbs which is a whole other scenario. I imagine even a large man may have a problem dealing with two animals that size. So far the information is sketchy. The size of the coyotes, the nature of the attack and the exact cause of death seem to be either unknown or not made public. Maybe it's just morbid curiosity but it seems like information like that may be of some use. If I see one in front of me, I'd kind of like to know whether I ought to be looking out behind me, too.