"It's just so hard to bear, to get along now without them," Virgil Marshall said. His mother, Kay Ferril, died in the crash.
The speed limit along the section of Interstate 95 where the crash happened is 70 mph, but an FHP report shows troopers estimate driver Leonardo Alvarez-Savageau of Massachusetts was traveling 107 mph.
They said Alvarez-Savageau was driving at night when he lost control and slammed into a concrete barrier.
The crash put the car's headlights out. Troopers believe that Ferril and her sisters, Rose Neal and Willie Bell Moragne, probably didn't see Alvarez-Savageau's wrecked car in the middle lane and slammed into it. A third car then hit them.
"It's just so empty now and nobody knows what to do," Marshall said.
Troopers recommended charging Alvarez-Savageau with three counts of vehicular homicide, a felony. But the state attorney's office decided not to pursue the charges.
Prosecutors said there wasn't enough evidence to prove the driver was speeding and reckless.
"To find out that this guy is not going to get charged is heartbreaking to our family and friends," Marshall said.
The state attorney's office said in a statement, "It is our duty to always carefully weigh the evidence in each case to ensure that prosecutions are only pursued when appropriate under the law."
Marshall said he has a message for Alvarez-Savageau.
"You wrecked a lot of lives and I hope you not sleeping at night, like we're not. And if you are, shame on you," he said.
Alvarez-Savageau told investigators he swerved to avoid another car, but witnesses cast doubt on that claim.
When contacted by WFTV Thursday, Alvarez-Savageau said he had no comment.
The family of the women who died said it plans to pursue a civil case against Alvarez-Savageau.