A break in the Lyon Sisters Case?

http://www.nbcwashington.com/news/local/Sheila-Lyon-Katherine-Break-in-Decades-Old-Disappearance-of-Md-Sisters-Police-244783641.html?asndjkandja

This tragedy haunted DC at the time, and I confess to still finding it so.  One of the great mysteries in our region.  I hope that the truth comes out, and hope they nail the bastard that did it...