CHICAGO -- A 23-year-old man sought in the slayings of three family members in Darien, Ill., was taken into custody at his parents' home in southern Florida this afternoon, officials said.
Jacob B. Nodarse was found sleeping in a minivan outside the home near Fort Myers around 3 p.m. EST, according to Deputy U.S. Marshal Rick Jessup.
Nodarse is being held in the Lee County Jail on an obstruction of police charge out of Illinois, but Jessup said he is a "prime suspect" in the murders of Jeffrey Kramer, 50, his wife Lori, 48, and their youngest son Michael, 20.
No murder charges have been filed against Nodarse.
Darien police had asked Florida authorities to be on the look-out for Nodarse, who they said was driving a blue BMW coupe and had family in Fort Myers and Miami.
An alert advised officers to use caution if approaching the car because he may be armed with a .40-caliber Glock pistol in a shoulder holster. The alert described him as "possibly suicidal." But the arrest occurred without incident, officials said.
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Shortly after the arrest in Florida, four police cars pulled up to a building where records show Nodarse once lived. About half a dozen police officers in bullet-proof vests entered the building, breaking down a door.
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Nodarse's grandmother, Ingrid Kampe, 64, was shocked at news of the arrest.
She said they had just had dinner together at a steakhouse on Sunday "and he seemed fine, he seemed really good" and didn't act out of the ordinary at all. She described him as kind, quiet and mild-mannered.
"He's got a heart of gold," Kampe said.
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Earlier today, Hamilton County sheriff's police had searched a stretch of rural highway in northern Florida after cell phone signals indicated he was there.
But deputies reported back to Darien police that they found nothing. "They gave us a location where the car may be located. We checked every location in the area and haven't found anything," said Hamilton County Sheriff J. Harrell Reid.
The couple and their son were found shot to death in the family's home on Kilkenny Drive in Darien early Tuesday morning.
The couple's daughter, Angela, 25, called police about 3 a.m. Tuesday from a closet in the house, authorities said. The Kramers' older son, Anthony, 29, was climbing out a window in his basement bedroom when police arrived.
A sixth person in the house, whom police described as a 17-year-old female friend of Michael Kramer, ran from the home pounding on neighbors' doors seeking help, police said.
Authorities found the bodies of Jeffrey and Michael Kramer on the first floor of the house. Lori Kramer's body was found on stairs leading to the second floor, police said.
Investigators did not recover a gun inside the home and had no suspect or motive, Deputy Police Chief John Cooper said Tuesday.
"There's nobody that can identify the person or persons in the house that did the shooting," Cooper added. "They heard the shots but didn't see anybody."
Police Chief Robert Pavelchik said investigators believe that the attacker or attackers targeted someone in the Kramer house.
"I don't believe it was a random act," Pavelchik said. "The neighborhood is not in danger."
(Carlos Sadovi, Andrew Wang and Pat Curry contributed.)