A Fairfax County woman indicted earlier this year for murder in the stabbing death of a male companion was arraigned yesterday on a separate murder charge stemming from the death late Monday night of a second man.

Mary Jackie Bellfield, 27, a mother of three, appeared before general district court Judge F. Bruce Bach on a charge of stabbing Francis W. Dyson, 23, to death with a kitchen knife at the 3503 Rolling Hills Ave. home they shared.

A preliminary hearing was set for Dec. 26. Bellfield was being held yesterday in Fairfax County jail, police said, in lieu of $100,000 bond.

According to police, Dyson was killed shortly after he intervened in a fight between Bellfield and another woman about 11 p.m. at the house south of Alexandria.

After he broke up the fight, police said, Dyson took Bellfield outside where he was stabbed. The knife severed an artery in Dyson's right causing massive internal bleeding. Dyson was dead on arrival at Mount Vernin Hospital shortly before midnight, police said.

Bellfield's court-appointed attorney, Fairfax lawyer Daniel Klein, said last night he had had no contact with his client since representing her on the earlier murder charge. "The last time I knew anything about her, she was in school," Klein said.

Bellfield was indicted for murder March 18 in connection with the death of another companion, Dennis Farmer. The charge was later reduced to a felony offence, unlawful wounding, to which she pleaded guilty on July 13. Bellfield received a two-year suspended sentence and two years' probation. Assistant Commonwealth Attorney Steven A. Merril said yesterday.

Merril said the first murder charge stemmed from a brawl between Bellfield and Farmer that began after a drinking party in which "he had beaten her up in front of several people."

"It appeared that was not an isolated incident.That was the kind of relationship they had," the prosecutor said.

Farmer was stabbed later in nearby woods, but the only witness to that incident, Bellfield's 10-year-old son, refused to testify at the trial "in the same fashion he did" before the grand jury, Merril said. That forced prosecutors to settle for a guilty plea by the defendant to a lesser charge, according to Merril.