New details have been released in the Sandra Bland murder case, including the chilling voicemail that she left for one of her friends while detained in jail and her admission to being suicidal in 2014.

Bland was pulled over and arrested in Texas for a traffic violation on Friday, July 10, reports USA Today. She was then taken to the Waller County Jail, where she spent the weekend. However, three days later, the 28-year-old Prairie View A&M graduate was found hanged in her cell.

Although the Harris County's medical examiner ruled the death as a suicide, the victim's family disputes that she was suicidal at that time and would purposely harm herself. Her death is now being investigated as a murder.

On Tuesday, authorities released video of the black woman's confrontational arrest after she was pulled over. In the video, Bland expressed frustration for being stopped after she failed to signal during a lane change. She tells state trooper Brian Encinia that she was changing lanes in order to get out of his way.

The trooper asked her to put out her cigarette; however she said it was her right to smoke within her own car. That's when Encinia proceeded to tell her to get out of the vehicle. In response, Bland questioned why he was forcing her out of the vehicle. The trooper did not respond and instead threatened to taser her.

At other points in the video, Bland can be heard screaming that the officer slammed her head in the ground and that her handcuffs were too tight.

On Wednesday, authorities released the voicemail she left a friend on Saturday, just a hours after she saw a judge and was hit with a $5,000 bond.

"I'm still just at a loss for words honestly at this whole process," she said on the message obtained by ABC News affiliate KTRK. "How did switching lanes with no signal turn into all of this, I don't even know."

It was also discovered that Bland admitted that she tried to kill herself using pills in 2014 after losing a baby on a jail intake form, reports CNN. However, in another section on the form, she wrote "no" to the question: "Attempted suicide?"

In response, Bland's relatives argued that she was never diagnosed with depression.

"I can tell you that we take issue with the notion that she was suffering from depression. She was never clinically diagnosed as this family understands," said family attorney Cannon Lambert. "Everybody has hills and valleys, and we don't know about any medication that she was taking in regards to ... depression."