Geran, 45, has a listed address in court records of Golfview Road in Middletown.
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Police said they believe Geran killed a woman in her 20s inside a vehicle and then dumped her body late Tuesday night along Woodsdale Road in Madison Twp.
Geran then allegedly killed an “elderly woman” during a hostage situation involving at least two women hours later Wednesday in a Trenton apartment on Sal Boulevard, according to the sheriff’s office.
Both women were fatally shot, according to police.
While Geran is a suspect in the two deaths, he has not been charged, police told the Journal-News.
The sheriff’s office said it is investigating both deaths as homicides.