A Douglas County judge on Tuesday ordered Nikko Jenkins held on $500,000 bail on one count of terroristic threats.
Prosecutors said the charge grew out of a series of threats that Jenkins or his family members made toward one of his female acquaintances.
The first involved a phone call in which Jenkins threatened to kill the woman and her family. She later reported that one of Jenkins' family members was outside her house.
In another instance, the woman reported that someone associated with Jenkins appeared to be following her car. When she stopped, the other driver sped up, pulled next to her and asked for her name. The incident ended when she denied being the person sought by the driver, prosecutors said.
Two other family members -- Jenkins' mother and a sister -- also appeared in court Tuesday in connection with the woman who reported being threatened.
Lori Jenkins and her daughter, Melonie, each are accused of trying to intimidate the woman to prevent her from going to police.
Bail for Lori Jenkins, charged with one count of witness tampering, was set at $150,000; Melonie Jenkins' bail for two counts of witness tampering was set at $250,000.
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Douglas County Sheriff Tim Dunning said he is waiting on DNA results to determine if an Omaha man being held in jail is linked to last month's slaying of a mother of three.
Results could come back as early as this week, he said.
DNA samples were taken from 33-year-old Andrea Kruger's car, he said. They also were taken from several locations where law enforcement officials made arrests last week.
Among the arrested is Nikko Jenkins, a 26-year-old Omahan who was released from prison on July 30. He was expected to appear in court Tuesday afternoon on a charge of terroristic threats unrelated to Kruger's slaying. He also has been arrested on suspicion of two counts of possession of a firearm by a prohibited person.
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After his arrest last Thursday, authorities said they wanted to question Jenkins about Kruger's slaying, as well as three others committed in August. All the victims were shot in the head.
Authorities also have three women associated with Jenkins in custody.
His sister, Erica Jenkins, 23, was arrested Thursday on a warrant for criminal mischief.
Christine Bordeaux, 39, is being held at the request of the U.S. Marshals Service.
Nikko's mother, Lori Jenkins, 46, and other sister, Melonie Jenkins, were arrested Friday. Each is accused of witness tampering.
Correction: An earlier version incorrectly stated the bail amount for Nikko Jenkins. It was set at $500,000.