http://www.nytimes.com/aponline/national/AP-Deans-Brother.htmlDean Attends Return of Brother's Remains
(my emphasis)
<snip>
Remains
tentatively identified as those of Charles M. Dean and his friend, Australian Neil Sharman, civilians traveling in Southeast Asia when they were killed in 1974, were discovered this month buried in a rice field in central Laos. The other two sets of remains are believed to be airmen unearthed in separate sites in northeastern Laos.
<snip>
They <the remains> have not been positively identified, but Dean has said he is confident they include his younger brother because of personal items found at the site, including shoes and a bracelet.
<snip>
Although Charles Dean was a civilian, the government considers the possibility that any remains recovered may be of missing servicemen, so treats them as such.<snip>
So there.