Arias acknowledged killing Alexander on June 4, 2008, at his suburban Phoenix home. She initially denied any involvement then later blamed masked intruders. Two years after her arrest, she said it was self-defense when the victim attacked her after a day of sex.
She stabbed and slashed Alexander nearly 30 times, shot him in the forehead and slit his throat from ear to ear, leaving him nearly decapitated before she dragged his mutilated body into his shower, where friends found him about five days later.
Prosecutors said Arias planned the killing in a jealous rage, as Alexander wanted to end their affair and planned to take a trip to Mexico with another woman.
Testimony in Arias' trial began in early January. The jury reached its verdict after about 15 hours of deliberations over four days. All 12 jurors — eight men and four women — unanimously agreed the killing was premeditated.