Bland's body was found, according to the sheriff's office, with a plastic trash liner bag tied around her neck. It was said to have been affixed to privacy partition in the cell.
According to the county's timetable, a guard had looked inside her cell about an hour before, and said Bland told her "I'm fine." She also asked how to make a phone call from her cell.
Those may have been the last words she spoke to anyone.
"She was found in a semi-standing position with a ligature around her neck. Ms. Bland was then placed on the floor to enable jailers to perform CPR," said Capt. Brian Cantrell with the Waller county Sheriff's Office.
There are several investigations into the arrest and now death of the 28-year-old Prairie View A&M grad, who was about to start working at her alma mater.
The FBI, DPS, District Attorney's Office, and Sheriff's Office also all conducting their own probes.
"I want fingerprints run. I want touch DNA tests down on the trash bag so we can know if anyone's DNA fingerprints besides Ms. Bland's were on that trash bag. And any other valid scientific testing we have so we can say with certainty what happened in her cell," said Waller County District Attorney Elton Mathis.
The Bland family and several ministers are calling for the Justice Department to launch one as well.
"This was not a case of suicide, but homicide," said Reverand Jamal Bryant, of the Empowerment Temple AME Church of Baltimore.
Bryant was in Hempstead he says at the request of the Bland family.
"We believe this is homicide, that somebody killed Sandra Bland. There are too many holes in this case," said Rev. David Madison, president of the AME Minister Alliance.
What was expected to be released Monday was DPS dash cam video of Bland's arrest near the college campus on July 10. Its release was delayed pending an opinion from the attorney general, but it's expected it could be made public in the next few days.
The district attorney said no inconsistencies were found between what the trooper said happened during Bland's arrest after a traffic stop and what the video shows.
Bland's family and supporters believe she was profiled as part of the traffic stop and was arrested without cause. She was charged with assault after the arrest.
Her family also commissioned an independent autopsy . Results may be made public Tuesday.