A 28-year-old man charged with the stabbing deaths two persons in a Southwest Washington apartment testified in D.C. Superior Court yesterday that he didn't commit the crimes.

Larry Hallman, 22, answered "no" when asked by his attorney whether he participated in the stabbing deaths of Curtis Arrington, 23, and Lois Ann Davis, 16, in an apartment at 1200 Delaware Ave. SW on Oct. 22, 1975.

On Monday, Raymond Paris, 18, testified that he, Hallman and two other men all took turns stabbing Arrington and Davis after they all went to the apartment trying to locate another man they wanted to kill in revenge after a fight.

Paris and the two other men have pleaded guilty in the case.

Hallman, answering questions by his attorney, Stuart Stiller, testified that he was not in the apartment at the time of the killings.

He testified that he encountered the three, who have pleaded guilty, outside the apartment building after the slayings.

Hallman was the only witness to testify in his defense and Judge Nicholas Nunzia said the jury would try to reach a verdict in the case today.

Under questioning by Assistant U.S. Attorney Mike Scheineger, Hallman testified that he previously had been convicted of one assault and two robberies and that he wasonvicted of one assault and two robberies and that he was living in a half-way house at the time of the murders.