D.C. Code § 19-311
After children, descendants, parents, brothers, and sisters of the deceased and their descendants, all collateral relations in equal degree share, and representation among the collaterals is not allowed.
Sept. 14, 1965, 79 Stat. 699, Pub. L. 89-183, § 1
1973 Ed., § 19-311.
1981 Ed., § 19-311.