JACKSONVILLE, Fla. -

Supporters for Marissa Alexander gathered Friday morning outside the Duval County Courthouse and read a letter they said she wrote thanking those standing behind her.

"It will be four years to the date on August 1 when this journey began," Alexander wrote. "This is the day that I found myself faced with a life or death decision."

Alexander thanked her supporters "for all that everyone has done and is doing in support of the situation that I am going through."

"I know that it is only by God's power who gives me the strength to endure this journey and still be able to radiate his light from on the inside and on the outside," Alexander wrote.

DOCUMENT: Read full letter from Marissa Alexander to supporters

In 2012, Alexander was found guilty of three counts of armed aggravated assault for firing what she claimed was a warning shot during a fight with her estranged husband, but that conviction was overturned and her retrial is set for December.

Last week, a judge denied Alexander's request for a "stand your ground" hearing. She remains on house arrest.

The groups Free Marissa Now and Atlanta-based Project South held "Stand Our Ground" week this week to raise awareness of Alexander's case and to celebrate exercising civil and human dignity rights.