Bell works with properties that have been affected by crime , environmental contamination , construction defects and natural disaster . He has consulted on Nicole Brown Simpson 's condominium ; the Beverly Hills estate where Charles Manson 's followers murdered Sharon Tate and four other people in 1969 ; the Rancho Santa Fe mansions where the bodies of 39 Heaven 's Gate cult members were found , the house in Boulder , Colorado , where JonBenét Ramsey was killed ; and the home of Sandy Hook Elementary School shooter Adam Lanza . He has also consulted on Hurricane Katrina ; the Bikini Atoll in the Marshall Islands ; the September 11 attacks at the World Trade Center ; and the United Airlines Flight 93 crash site in Shanksville . Bell has traveled to Chernobyl , Hiroshima ; to the World Trade Center site ; and to Egypt , Jordan , Israel and West Bank to find comparisons in properties damaged by terrorist attacks . He has also traveled to Antarctica to interview scientists about climate change how it affects costs , such as insurance for home owners . The Appraisal Institute published Bell 's book '' Real Estate Damages : Applied Economics and Detrimental Conditions '' in 2008 . In 2011 , Bell returned from Guam , where he consulted with landowners whose property included the cave where Shoichi Yokoi , a Japanese army sergeant , hid for 28 years , unaware that World War II had ended . The landowners opened a theme park on the property and consulted with Bell
September 11 attacks
September 11 attacks
Randall Bell