AUSTIN, Texas (AP) — Texas authorities are expected to face sharp questioning over why cellphone video Sandra Bland took during her confrontational 2015 traffic stop never publicly surfaced until now.

A state House committee wants answers at a hearing Friday after the 39-second clip emerged this month . Bland was found hanging in a jail cell near Houston three days after she was pulled over for not signaling a lane change.

The death of the 28-year-old black woman set off protests nationwide.

Her cellphone video shows Trooper Brian Encinia, who is white, drawing a stun gun while ordering Bland out of the car.

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