"Once I got her downstairs I just asked someone for a towel and applied [as] much pressure as I could to it to try to save her life," said Potts. "I kept just trying to be happy and calling her name and 'come on, Lucy, come on.'"
Despite Potts' efforts, however, Lucy went into cardiac arrest on Saturday and died.
"She was a fighter and she did good, she really did," Potts told WINK News. "If it wasn't for her, you know, he could've probably stabbed all of us."
Williams is now in jail for battery, but authorities say he may face additional charges.
Click here to help pay for Lucy's veterinary and funeral expenses, or click here to learn more about animal cruelty and domestic violence.