Three years ago, Gwendolyn D. Butler Johnson lamented the shooting death of her "baby son" in the basement of a small house in Farrell.

On Wednesday, Ms. Johnson's shrieks of "Oh God!" filled the 600 block of Baldwin Avenue in Sharon when she learned that another son was suspected of shooting one woman to death and pistol-whipping two others.

Calvin Young, 25, of 432 Malleable St., Sharon, was arrested on charges of criminal homicide and aggravated assault after a daylong manhunt.

Police say Young shot and killed Carolyn McVehil, 21, of 670 Baldwin Ave., at about 11:30 a.m. Wednesday in her home. He is also accused of beating a 49-year-old Sharon woman and a 19-year-old Uniontown woman, neither of whom were identified by police, with a gun.

Young, who had fled the scene by the time police arrived, was tracked down in New Castle just before 10 p.m, police said.

Minutes after police were called to the scene Wednesday morning, Ms. Johnson arrived, screaming and falling to the ground in the middle of the street, which was cordoned off between Morrison Street and Budd Street with police tape and traffic barricades.

Others watched from the sidewalk as police from Sharon and Southwest Mercer County Regional swarmed the area.

It wasn't immediately known who reported the violence to 911. A next-door neighbor and one across the street said they didn't hear anything unusual until authorities arrived.

They were surprised there had been a shooting, they said. A relative of Ms. McVehil's who asked not to be identified called the crime "unreal."

"It's really weird," he said.

He stood outside the police tape and watched authorities finish up after 4 p.m.

Police said Ms. McVehil was found dead in the living room of the light-blue two-story house.

The 49-year-old woman was bleeding from a head wound as medics wheeled her out on a gurney. The 19-year-old woman wasn't spotted at the scene. Police said she also suffered a head injury.

Police alerted Mercer County Children and Youth Services because children lived in the home, although exactly how many wasn't immediately known. One infant was sheltered in the back of a parked ambulance until CYS agents arrived.

Sharon City School District went into overdrive to protect students at C.M. Musser Elementary School, which is only a few blocks away from the scene of the crime.

Schools superintendent John Sarandrea said with Young on the loose they didn't' want students walking home.

"We made calls and asked parents to come pick up their children," Sarandrea said. "It was a terrific team effort."

Police from throughout the Shenango Valley, along with county sheriff's deputies and the Mercer County Critical Incident Response Team fanned out across the city Wednesday searching for Young.

CIRT's presence combined with dozens of marked and unmarked patrol cars made the area look like a war zone.

On Dec. 15, 2007, Ms. Johnson's son and Young's brother, 21-year-old Prince Butler, was gunned down by Brian Burks, 18, of Farrell, in what Mercer County Judge Thomas R. Dobson called a "totally senseless crime."

When Dobson sentenced Burks to 39è years in prison, Young had to be led from the courtroom by sheriff's deputies after he told the judge he had "revenge" on his mind.

Outside the courtroom, Young called his brother's murder "just crazy. I have nightmares about it."

Ms. McVehil is the first homicide case in Mercer County in 2010.

She was pronounced dead at 11:45 a.m. Wednesday at the scene by Mercer County Deputy Coroner John Libonati, who said she died of a single gunshot wound.

An autopsy will be performed by Erie pathologist Dr. Eric Vey at 10 a.m. today to officially determine the cause and manner of death.

The condition of the pistol-whipped women wasn't released by authorities.