A California judge has agreed to a pretrial release for Noor Salman, the widow of Pulse nightclub shooter Omar Mateen, though she won't be immediately allowed to leave.
Noor Salman and Omar Mateen are seen in this photo from Salman's Facebook page, which has been deleted.
But U.S. Magistrate Judge Donna Ryu said in an Oakland courtroom that the government had not shown Salman was a danger to the community or a serious flight risk.
In handing down her ruling, Ryu said there was no proof Salman had any connection to the Islamic State jihadist group or had exhibited extremist views.
Orlando police Chief John Mina said he was disappointed with the judge's decision, but praised the work of federal investigators on the case.
Mateen pledged allegiance to ISIS during his June 12 attack at a gay nightclub where he killed 49 people and injured dozens more.
Salman denies charges that she helped Mateen carry out the massacre, but there has been an outcry in Florida over the Californian court's decision.
Her attorneys say she would be released Friday on a $500,000 bond. Her trial has not been scheduled yet.
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Federal prosecutor Sara Sweeney told the court that Salman initially said during questioning that she didn't know anything about the attack but later told investigators that Mateen had abused steroids, was "pumped up" on the night of the attack and said "this is the one day" as he left his home.
Salman told The New York Times past year that she was not aware of her husband's plans.
Outside the courtroom, her uncle, Abdallah "Al" Salman, with whom she will live, again declared his niece innocent.
Salman was arrested in California, where she'd been living with her young son.
Salman has been charged with helping Mateen plan the worst mass shooting in modern USA history and lying to investigators. Ryu said if there is a trial, it could take place in Florida.
But prosecutors argue that Salman remains a danger to the public.
Ms Salman's lawyer, Linda Moreno, said it was "extraordinarily rare" for bail to be given in terrorism cases. Among the purchases was an $8,000 diamond ring for Salman.