RICHMOND, Texas — A former Missouri City, Texas, police officer who was charged with manslaughter in a fatal crash that killed a mother and her son was arrested Wednesday, according to the Fort Bend, Texas, district attorney’s office.

Blademir Viveros, 27, was charged with two counts of manslaughter and one count of aggravated assault.

His bail was set at $250,000 on the two counts of manslaughter and $300,000 on the aggravated assault: $800,000 total.

Authorities say Viveros responded to a robbery in progress call where he struck the victims on June 20.

ORIGINAL REPORT: 16-year-old ‘died on his birthday’ when Missouri City police car hit him and his mother, father says

According to police, a man armed with a gun approached a victim and stole $200 before fleeing in a silver Honda Civic.

Meanwhile, Viveros was heading east when Stewarts pulled out of a Dollar Tree parking lot. That’s when the officer tailgated their vehicle, police said.

Both the mother and her son, identified as Angela Stewart, 53, a school counselor from Houston, and her 16-year-old son, Mason Stewart, died at the scene.

Officials said Viveros was driving over the posted speed limit and did not have his hazard lights on.

Family members told ABC affiliate Houston KTRK that the crash occurred on Mason’s 16th birthday.

On Wednesday, attorney Jack Nugent shared the following statement from the Stewart family.

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“We are still saddened and heartbroken beyond words by the tragic and senseless loss of our beloved wife, mother, brother and son. Angela and Mason were taken from us far too soon by the actions of a police officer that shocked the conscience. charging is only the first step toward accountability and should be only the beginning of holding the officer accountable for his wrongdoing. It doesn’t heal the pain we feel every day We hope our fight serves as a constant reminder that life is precious and justice is necessary. We will continue to honor Angela and Mason’s memory and support any action taken that will in any way help prevent others from enduring this type of devastation. loss.”

The DA’s office said a court date for Viveros has not been set.