D.C. Code § 18-103: Execution of written will; attestation.

A will or testament, other than a will executed in the manner provided by section 18-107 or Chapter 9 of this title, is void unless it is:

(1)

in writing and signed by the testator, or by another person in his presence and by his express direction; and

(2)

attested and subscribed in the presence of the testator, by at least two credible witnesses.