Testimony began yesterday in the trial of a Baltimore teen who prosecutors say attempted to kill a man and a 14-year-old girl while he was supposed to be on home detention.

The girl told a Baltimore Circuit Court jury yesterday that she was walking out of an East Baltimore recreation center with a group of children on Nov. 5, 2001, when Tyrone Beane, 18, stole money and a necklace from her. She said that Beane then pressed a gun to her head and pulled the trigger four times. The gun did not discharge because it jammed, prosecutors said.

That robbery occurred moments after Beane shot a man in the groin during a fight on a nearby street, prosecutors said.

Beane "pulled the trigger to shoot him," Assistant State's Attorney Greg Hopper said. "And he ran over to a ... girl who was with a bunch of kids and was willing to shoot her."

Beane faces two counts of attempted murder. His lawyer, Assistant Public Defender Charles H. Dorsey, argued that the girl has given conflicting descriptions of her assailant.

Beane, of the 700 block of Wharton Court, also faces a first-degree murder charge in the shooting death of Taharka McCoy in January 2002. He faces charges of assault and drug possession that were filed in November 2000.

Beane's trial for McCoy's murder was postponed yesterday until March 6 as prosecutors argued that they needed more time to locate a key witness.

McCoy was killed three days after a routine juvenile court hearing for Beane during which prosecutors were unaware that the boy recently had been arrested on adult charges of striking a man on the head with a gun and sticking the weapon in his mouth.