Trump took to Twitter to attack Carrier union boss, lashing out at another critic via his favored social media platform.
A 14-year-old boy was in critical condition after the shooting at Reno's Hug High School, which was witnessed by more than 40 students.
Lucy Richards, 57, was indicted on four counts of 'transmitting threats in interstate commerce,' the Department of Justice announced Wednesday.
Donald Trump is stocking his White House with fellow billionaires.
The gunman escaped and was considered extremely dangerous. A $20,000 reward was offered for the capture of suspect Minguell Kennedy Lembrick, 32.