Deputies arrested them on charges of obstructing an officer — withholding information.
"We would not prosecute them," Ridgway said, because there wasn't enough evidence for a conviction.
Sometimes police and prosecutors work a long time to gather enough evidence before making an arrest.
A Seminole County grand jury in February handed up a murder indictment in a 21-year-old homicide: Betty Claire Foster was stabbed to death at the Casselberry computer store where she worked in 1991. David Lee Hedrick, 50, a computer and audiovisual specialist, is now in the Seminole County Jail, awaiting trial.
A Brevard County grand jury last year indicted a woman there on a first-degree-murder charge in a three-year-old homicide.
And in Orange County, Brett Ballard and his wife, Joy, have been waiting more than three years to find out whether the security guard who fatally stabbed their 20-year-old son, Marcus, in 2008 will be arrested and prosecuted.
Marcus Ballard was stabbed eight times in the torso and neck and several times on the palms of his hands, according to his autopsy. The security guard told deputies the men were fighting at a Pine Hills apartment complex and he used his knife to defend himself after Ballard had begun choking him.
Police and prosecutors sometimes get it wrong.
An officer was dispatched to a Miami-Dade County neighborhood in response to a reported burglary. About that same time, a black 15-year-old, his brother and a friend ducked into a neighbor's carport because of a sudden rain, according to an appeals-court ruling.
The officer saw the boys, drew his weapon, and the 15-year-old took off running and hid. An officer soon found him, ordered him facedown in the mud, handcuffed him and arrested him on a charge of resisting an officer without violence, according to the ruling.
The Third District Court of Appeal in May 2010 reversed the juvenile court's finding in the case, ruling that the police officer should never have made the arrest.
There was no probable cause that the boys had committed a crime.