I don't understand the first two bolded sections. Are you saying it can be done or it can't?
OK. District of Columbia Law 23- 582(b) reads as follows:
(b) A private person may arrest another -
(1) who he has probable cause to believe is committing in his presence -
(A) a felony, or
(B) an offense enumerated in section 23-581 (a)(2); or
(2) in aid of a law enforcement officer or special policeman,
or other person authorized by law to make an arrest.
(c) Any person making an arrest pursuant to this section shall
deliver the person arrested to a law enforcement officer without
unreasonable delay. (July 29, 1970, 84 Stat. 630, Pub. L. 91-358,
Title II, § 210(a); 1973 Ed., § 23-582; Apr. 30, 1988, D.C. Law 7-104,
§ 7(e), 35 DCR 147.)"