Emad Fathy Moawad was jailed on nearly $2 million bail.
Douglas John Kantor, 25, died from his injures following the Saturday shooting that left more than a dozen injured.
Officers are still searching for another suspect in the mass shooting case.
Two people were critically injured after gunfire erupted along 6th street in the Texas city's entertainment district.
David Kruchten, 38, has agreed to plead guilty to one count of attempting to produce child pornography.
Isaac Lamon Adams was barred from legally owning a gun because of a previous criminal conviction, investigators said.
The once high-flying attorney faces constant ridicule after his “cataclysmic fall” and should spend no more than six months behind bars, his attorneys said.
His plea came a day after his wife, Lori Vallow-Daybell, was committed to a psychiatric facility for 90 days. She has also been charged with murder.
Steven Brandenburg was sentenced to three years in prison for two felony counts of attempting to tamper with a consumer product.
The body of the victim was discovered after two truck drivers noticed the fuel wasn’t flowing smoothly during unloading,