Well...never heard of a coyoye drawing blood off a human unless he was near dead or dead. Now, wolves attacking people - yes. Wolves attacking people is writ large in history. I suspect the poor women was either attacked by wolves or a feral dog pack.
I’ve dealt with feral dog packs when I lived in the California backcountry. Carried a pump shotgun on my shoulder and a Buntline on my hip to let feral dogs know who was the boss.
What happened is that STUPID cityfolk would drop off Fido in the bush, thinking they were doing the city mutt a favor. After all, they assumed cans of dog food grew on trees, and whenever Fido got hungry, he could whip out the can opener and eat.
In fact, the mutts packed up, creating a feral dog pack - deadly, uncontrollable and something you’d best shoot on sight.
That is my guess of what happened to this unfortunate woman - a feral dog pack got her. Wouldn’t be the first time feral dogs killed people.
“The eastern coyote is actually a wolf-coyote mix, having interbred with wolves in northern Québec and Ontario as it moved eastwards. The mixed parentage has made it a very effective and adaptable predator”