(sorry, they're not here),
maybe if you don't know where to look
As I said in the article, the ECF (and plenty of others) has been looking for and soliciting evidence from Nova Scotia to Georgia and west to the Mississippi for ten years without logging a single confirmed piece of evidence.
Meanwhile, incidental evidence - roadkills, trapping and hunting casualties, random trailcam pics - keep turning up in the Midwest where they were also hunted out a century ago:http://www.easterncougarnet.org/bigpicture.html
Florida loses 10-15% of its panthers every year to roadkill. If they were here, why shouldn't the same incidental evidence be appearing throughout the East?