Sproul,I can't call anybody a liar if they saw yotes a long time ago but I've been hunting Potter/Clearfield for 30 plus years and back in the 70's and even 80's coyotes weren't even discussed.I never saw or heard one until the middle to late 90's.That's just from my own personal experiences.
I think it was the winter of 93 in the deep snow where we found two gobbler carcusses what looked to be kills by a bobcat.