D.C. Code ยง 12-301
D.C. Code ยง 12-302 (a)(1)
Claims must be brought within three years "from the time the right to maintain the action accrues." If the victim is a minor when the injury occurs, he or she may bring the action within three years of his or her 18th birthday.
https://www.ncsl.org/research/human-services/state-civil-statutes-of-limitations-in-child-sexua.aspx