Benjamin Hanil Song is accused of participating in the July Fourth assault near the Prairieland Detention Center, where attackers opened fire.
The 2,000 National Guardsmen account for nearly half of the soldiers sent to the city to deal with protests over Trump's immigration crackdown.
Retired Army Brig. Gen. Anthony Tata has made inflammatory comments about Democratic leaders and former President Barack Obama.
Spc. Jaylin Perez died Tuesday after receiving treatment for severe electrical burns sustained last week while on duty in Germany, the Army said.
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