I have heard of several sightings in Oklahoma over the past few years and a number sightings in my area. Also could mention the black bears and alligators that have also been seen in SE Oklahoma.
http://www.usatoday.com/news/nation/story/2012-06-14/mountain-lions/55586994/1
More mountain lions are settling in the Midwest, study shows
By Jonathan Ellis, USA TODAY
http://www.usatoday.com/news/nation/story/2012-06-14/mountain-lions/55586994/1
More mountain lions are settling in the Midwest, study shows
By Jonathan Ellis, USA TODAY