From the article:
Now, Booth's descendants have authorized the exhumation of John Wilkes Booth's brother, Shakespearean actor Edwin Booth, to get a DNA sample and close the books on the case. The DNA will be compared with a sample from vertebrae of the man killed in the barn. The body itself is buried but bone samples are in the collection of the National Museum of Medicine and the (incredible) Mutter Museum in Philadelphia.
|Ford's Theater now - taken with my phone the other day|
Source -> http://www.boingboing.net/2010/12/25/did-john-wilkes-boot.html