Members of Travis Alexander's family delivered emotional testimony about how his tragic death has affected their lives during day six of the Jodi Arias sentencing retrial.

Alexander, a 30-year-old California salesman, was brutally murdered in his Phoenix, Arizona home on June 4, 2008. According to medical examiners, his ex-girlfriend, Jodi Arias, stabbed him 27 times, primarily in the back, torso and heart. She also slit his throat from ear to ear, nearly decapitating him, and shot him in the face before she dragged his bloodied corpse to the shower where she left him crumpled over. In total, the killing was done in a little less than two minutes.

Although Arias, 34, was convicted of first-degree murder in Alexander's death in 2013, the jury failed to reach a unanimous decision on her sentencing. As a result, the retrial will determine whether she should be sentenced to death, life in prison, or life with a chance of release after serving 25 years.

On Thursday, Alexander's relatives took the stand, testifying about the amount of emotional and physical trauma they have endured since his death.

Tanisha Sorenson, his younger sister, said her life had been a "living hell" and that she is haunted by his autopsy photos, which are easy to find on the Internet.

"Now the autopsy photos of my brother's decomposing body and mummified face are the images I can't get out of my head," she said, according to the Arizona Republic.

Sorenson added that her brother's aspirations to be a father have been stolen from him.

"Travis doesn't get to have that life," she said while sobbing. "He doesn't get to have those children."

His brother, Steven Alexander, said that he has experienced nightmares, ulcers and constant trauma in wake of his brother's death.

"When I lay down at night, all I can think about is my brother's murder," said Steven as family members could be heard crying, reports The Huffington Post.

"My wife has woken me up from a nightmare because I was screaming in my sleep," he said, adding that he has recurring dreams of Arias slitting his throat.

Also on Thursday, Maricopa County Superior Court Judge Sherry Stephens barred the public from watching the first witness called by the defense team.

"This was not an easy decision," said the judge, who declined to reveal the witness' identity.

As a result, both members of the public and media were then asked to leave as the trial continued behind closed doors.

Members of Travis Alexander's family delivered emotional testimony about how his tragic death has affected their lives during day six of the Jodi Arias sentencing retrial.

Alexander, a 30-year-old California salesman, was brutally murdered in his Phoenix, Arizona home on June 4, 2008. According to medical examiners, his ex-girlfriend, Jodi Arias, stabbed him 27 times, primarily in the back, torso and heart. She also slit his throat from ear to ear, nearly decapitating him, and shot him in the face before she dragged his bloodied corpse to the shower where she left him crumpled over. In total, the killing was done in a little less than two minutes.

Although Arias, 34, was convicted of first-degree murder in Alexander's death in 2013, the jury failed to reach a unanimous decision on her sentencing. As a result, the retrial will determine whether she should be sentenced to death, life in prison or life with a chance of release after serving 25 years.

On Thursday, Alexander's relatives took the stand, testifying about the amount of emotional and physical trauma they have endured since his death.

Tanisha Sorenson, his younger sister, said her life had been a "living hell" and that she is haunted by his autopsy photos, which are easy to find on the Internet.

"Now the autopsy photos of my brother's decomposing body and mummified face are the images I can't get out of my head," she said, according to the Arizona Republic.

Sorenson added that her brother's aspirations to be a father have been stolen from him.

"Travis doesn't get to have that life," she said while sobbing. "He doesn't get to have those children."

His brother, Steven Alexander, said that he has experienced nightmares, ulcers and constant trauma in wake of his brother's death.

"When I lay down at night, all I can think about is my brother's murder," said Steven as family members could be heard crying.

"My wife has woken me up from a nightmare because I was screaming in my sleep," he said, adding that he has recurring dreams of Arias slitting his throat.