Marissa Alexander, the battered mother whose 20-year prison sentence for firing a "warning shot" at her abusive husband attracted nationwide attention, now faces 60 years in prison if she’s reconvicted.

Alexander’s original May 2012 conviction was overturned Sept. 26, 2013, by the First District Court of Appeal in Florida, which found the presiding judge at her trial unfairly instructed jurors she had to prove her claim of self-defense.

Now 33, Alexander was released on bail Nov. 27 after 21 months behind bars. State Attorney Angela Corey refiled the same charges and a retrial is scheduled to begin July 28.

Alexander was arrested on Aug. 1, 2010, after firing one shot inside her Jacksonville, Fla., home. There were no injuries. Nine days earlier Alexander had given birth to a premature baby girl fathered by Rico Gray, who returned to the home and began to argue with Alexander.

Alexander retreated to a bathroom, but Gray broke down the door and allegedly choked her. She fled to the home’s garage but was unable, she says, to open the door and returned inside with her legally owned gun. Gray allegedly threatened to kill her and moved toward her, at which time she fired the shot.

Corey says she did so out of anger, not fear. Alexander was charged with three counts of aggravated assault for allegedly endangering the lives of Gray and two children in the home. The charges came with a 20-year sentence because Florida’s 10-20-life law sets mandatory penalties for crimes when a gun is involved.

When she was convicted – after refusing a plea deal for three years in prison – presiding Circuit Court Judge James Daniel said his hands were tied and sentenced her to three 20-year stints, to be served concurrently.

Florida courts differ on whether state law requires 10-20-life sentences to be served consecutively or concurrently. The appeals court that tossed Alexander’s conviction has said they must be consecutive, but other state courts of appeal disagree, The Florida Times-Union reports.

Assistant State Attorney Richard Mantei confirmed Saturday to the Times-Union Corey’s office will be seeking consecutive sentences.

Corey rose to national fame during her unsuccessful 2013 prosecution of George Zimmerman for allegedly murdering Trayvon Martin. Her conduct in the Alexander case has enraged many area residents, some of whom believe she’s bought into stereotypes about African-American women being violent.

In January Corey claimed Alexander violated the terms of her release by driving relatives around town and making shopping trips. Her request to reimprison Alexander was turned down by Daniel, the same judge who presided over the 2012 trial, who found a correctional service counselor improperly gave approval for the trips.

Alexander’s supporters say Corey is on a vendetta and that Gray’s admitted history of domestic violence proves a warning shot was almost certainly warranted.

"I got five baby mammas, and I [hit] every last one of them, except for one," Gray admitted to police in a deposition before Alexander's first trial. He was arrested in 2006 and 2009 for domestic battery, but in 2006 the charge was dropped and in 2009 he received probation. Alexander was granted a restraining order against Gray after his 2009 arrest.

In a Sunday press release members of the Free Marissa Now coalition denounced Corey and asked for donations to Alexander’s defense fund. The group organized a 1,000-person rally demanding Corey's resignation in July.

“Anyone who believes that domestic violence is unjust should be deeply shaken by Corey's abusive prosecution of Marissa Alexander and should be advocating for Alexander's freedom,” said coalition member Sumayya Fire.

"Remember that this entire case boils down to a woman defending her life from her husband who attacked her, strangled her, threatened to kill her, whose beatings have sent her to the hospital and likely caused her to have premature labor,” Fire said. “A husband who confirmed in a deposition that he beat her, that he was in a rage when he attacked her, and that he has beaten other women with whom he was involved.”

Another coalition member, Helen Gilbert, said: "If anyone still thought Angela Corey was seeking justice rather than making a political power-play, this latest news must erase all doubt. Corey is using the full power of the system to serve her own political ambitions, at the sake of one woman's life and every woman's safety."

Corey’s office denied wanting to give Alexander a 60-year sentence in a Monday statement emailed to reporters, saying six decades behind bars is merely what the law requires.

“It has been erroneously reported that State Attorney Corey wants to increase the Defendant’s prison time if she is convicted at trial,” the statement said. “Absent a plea agreement, if convicted as charged, the law of the State of Florida fixes the sentence.”