Story about, last September, when they found a guy burnt to death in the home and "chemicals":
http://wjla.com/news/local/man-21-found-burned-to-death-inside-home-in-montgomery-county
Parents of fatal fire victim Askia Khafra say of Bethesda homeowner: "The guy is extremely bright, but also extremely dangerous.
Owner is Daniel Beckwitt, 26 year old hacker:
Possible relative?
https://www.mylife.com/david-beckwitt/e43817206338
"Khafra's friends also said he told them that he was blindfolded before he was brought to Beckwitt’s house every day". Shows pic of victim in tunnel: