(WMC-TV) - Now that the defense has rested its case, it is now the jury's turn to decide whether they believe Madden was trying to protect herself. If not, Shanterrica Madden could spend the rest of her life behind bars.
Madden and the victim, Tina Stewart, were roommates at Middle Tennessee State University in Murfreesboro.
In March 2010, the two got into a fight after Stewart called police on Madden for smoking marijuana in their apartment.
Madden claims during the fight that Stewart kept hitting her in the head and would not stop.
Through tears, Madden told the court that is why she grabbed a knife and stabbed her roommate. She even said she wanted to take her own life with the same knife.
"Because I hurt her, and I wasn't trying to do it. And I'm sorry, I really wasn't trying to do it," Madden cried. "I wanted to kill myself. I just wasn't myself. If I could do it over again, I would help her, I would."
After the state rested its case, Madden's attorneys asked the judge for an acquittal. That request was denied.
Madden is charged with first degree murder. If the jury finds her guilty, she will face life in prison.
That verdict is expected to be announced Monday.
Stay with Action News 5 and WMCTV.COM for the latest details on the case.