Two men and two women are in jail on robbery charges and are being questioned about the death of former Albany doctor Tommy Paschal.
Tracy Jo Walker, Joshua David Hodge, Brandon Aman and Tracy Atwood were all picked up Tuesday night, after Paschal was found shot to death inside his 3rd Avenue home.
The four are not charged with his death.
Tracy Atwood was previously arrested in 2011 for shooting at Paschal during an argument at her home in Lee County.
Paschal was not injured in that incident, but was himself arrested when deputies found drug bottles linked to him inside Atwood's house.
The former pediatrician's death comes 26 years after his then-wife tried to kill him by injecting him with the powerful surgical drug, Pavulon.
He was permanently disabled by the effects of the drugs.
Karen Paschal pleaded no contest to aggravated assault charges in November 1988 and was sentenced to 20 years probation.
Walker, Hodge, Aman and Atwood are charged with robbery.
Police say the robbery charges stem from the theft of a man's cell phone, but they say the victim in that case was not Tommy Paschal.
All but Hodge are also charged with probation violation.
An autopsy shows Paschal died of a gunshot wound to the mouth.
Investigators say they don't yet know if his death is a homicide.
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