While Sandra Bland's family maintains that the woman found dead in a Texas jail cell would not have taken her own life, authorities are pointing to mounting evidence that they say shows she hanged herself.

Marks around the neck of Bland, 28, neck were consistent with suicide by hanging, Waller County prosecutor Warren Diepraam said. Briefing reporters in Hempstead on Thursday, Diepraam said that Bland's body showed no signs of defensive injuries to suggest a final struggle for survival and that she had about 30 small cuts on her wrist that were probably self-inflicted within the last few weeks.

Some lacerations or abrasions were found on her wrists. Those were consistent with a struggle while being handcuffed, Diepraam said.

Bland was arrested in a traffic stop three days before she was found in her cell on July 13. Her family and friends dispute the official finding that she killed herself using a noose fashioned from a plastic garbage bag.

Texas Rangers and the FBI are investigating. The county district attorney has said the matter will be turned over to a grand jury, which does not meet again until August.

A woman who occupied a jail cell next to Bland said the Chicago-area woman was emotional and wept often during her three days in jail.

Alexandria Pyle told KTRK-TV of Houston that Bland was "sort of distraught" that a friend had not come to bail her out of jail. She said Bland told her she "was not equipped" for incarceration and thought she was the victim of an injustice.

Pyle said she heard no signs of a struggle in the cell.

Also Thursday, Bland's sister confirmed that Bland had taken prescription medication for seizures in the past.

Booking documents filled out for Bland after her arrest indicate she told staff at the jail that she had epilepsy and was taking medication for it. The forms identify the drug as Keppra.

Other forms, however, say she was not taking medication.

Company information on Keppra, which is sold in regular and extended-release forms, says that "antiepileptic drugs, including Keppra and Keppra XR, may cause suicidal thoughts or actions in a very small number of people, about 1 in 500."

Sharon Cooper told The Associated Press that her sister suffered from seizures about a decade ago but had not had any in recent years and was not on medication.

The medication was not the only inconsistency in the jail-intake papers. One questionnaire said Bland took pills in 2015 in an attempt to kill herself after losing a baby. A separate form filled out by another jail employee said the suicide attempt occurred in 2014. Authorities said any contradictions in the jail documents were the result of Bland's inconsistent answers to jailers' questions.

Cooper said her sister had a miscarriage in May 2014 but got through it. Cooper also said she was not aware of any suicide attempt.

Asked if her sister could have been getting treatment without relatives knowing, Cooper said the family's five sisters were "above board" with each other and, if anything, "overshared."

"If it was happening, I would have known," she said.

Preliminary results of an independent autopsy arranged by the family showed bruising to deep muscle tissue in Bland's back, consistent with the officer having his knee there, Cooper said.

She would not say if there were other findings. Full results will not be in for a couple of weeks.

Preliminary results of the Texas autopsy also showed that Bland had marijuana in her system. The drug-test results are worth noting because they could be "relevant to her state of mind," Diepraam said.

Bland's death comes after nearly a year of heightened national scrutiny of police and their dealings with black suspects, especially those who have been killed by officers or died in police custody. It has resonated on social media, with posts questioning the official account and featuring the hashtags #JusticeForSandy and #WhatHappenedToSandyBland.

Bland's family has said she was not despondent and was looking forward to starting a new job at her alma mater, Prairie View A&M University.

However, Bland posted a video to her Facebook page in March, saying she was suffering from "a little bit of depression as well as PTSD," or post-traumatic stress disorder.

Cooper said that "everyone has peaks and valleys" and that the Facebook video might indicate her sister was just having a bad day or a bad few days.

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Keyser reported from Chicago.

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Dashcam video posted by Texas Department of Public Safety: https://www.youtube.com/watch?v=CaW09Ymr2BA.