The 20-year-old woman, who told police she stabbed her ex-boyfriend to death, is charged with first-degree murder. The victim's sister said the woman confessed to the crime on Facebook and shows no remorse.
Henryetta Police said Samantha Stansifer was covered in Anthony Hall's blood when they arrested her two weekends ago.
Hall was found dead in a bedroom with multiple knife wounds.
Hall's sister, aunt and other family members came to the Okmulgee County courthouse for Stansifer's first appearance.
Amanda Feldpausch said her brother invited Stansifer to stay with him after they broke up as a kind gesture.
She said Stansifer killed him then posted on Facebook, "I did it. He deserved it."
"He was asleep, she was going through his phone, saw that he had been texting another girl, so she said she went to the kitchen, got two knives, and stabbed him death. They said she had no remorse whatsoever, didn't even faze her to talk about it," Feldpausch said.
Stansifer's attorney declined comment.
Feldpausch said her brother was a good guy and did not deserve to die the way he did.