The unedited recording shows Ms Bland - who was found hanged in her cell
following an apparent suicide on 13 July - speaking to a jail worker and making
a phone call.
Amid speculation the 28-year-old's body was placed on the jail's floor
so a mugshot could be taken, the CCTV footage also shows Ms Bland standing up
for the photograph.
Ms Bland, a black woman, was arrested on 10 July for a minor traffic
offence and her death in custody has led activists to claim it is another
example of police brutality against minorities.
Judge Trey Duhon has confirmed several Waller County officials have
received death threats over the case, and the FBI is investigating the most
serious.
"This is Sandra Bland. There's no other way around it. This video
has not been altered or doctored in any way. These are the raw files.
"There's no footage that indicates to me that Ms Bland was treated
unfairly or was mishandled or mistreated in any way, shape or form while she
was in the Waller County Jail."
Ms Bland, who was from suburban Chicago, had been stopped by Officer
Brian Encinia for failing to signal a lane change near Prairie View, Texas.
She was taken into custody after the incident escalated, and was facing
allegations that she had kicked the state trooper in the shin.
Earlier this week, Houston station KTRK-TV released a voicemail that Ms
Bland left a friend while in jail, in which she calmly expressed her
frustration.
In the message, she said she is "still just at a loss for words
honestly at this whole process".
She added: "How did switching lanes with no signal turn into all of
this?"
On Monday, an initial toxicology report was released, which suggested
that Ms Bland had "a substantial amount of marijuana in her system".
The county's sheriff has also confirmed that Ms Bland was not placed on
suicide watch despite her telling them she had previously tried to take her own
life with pills after losing a baby.
His office has admitted violating state rules on jail training and
monitoring inmates.