Dimitrios Pagourtzis was arrested May 18 and charged with capital murder of multiple persons, according to the Galveston County Sheriff's Office.
According to the Doral Police Department, there are no known victims at this point.
Miami Police Chief Jorge Colina said video of the incident "depicts a clear violation of policy."
The shooting took place Tuesday evening at a Home Depot in northeast Dallas.
Before running a van into pedestrians, the suspect wrote a Facebook post praising a 2014 shooting and alluding to a now-banned Reddit channel.
At least nine people were killed and another 16 were injured when the van struck pedestrians.
The sheriff's office reported that the suspect in a school shooting in Florida is in custody.
Haig said that he no longer sells ammunition and that he doesn't know "wacko" Stephen Paddock.
The 20-year-old suspected of killing University of Pennsylvania student Blaze Bernstein reportedly posted about guns and waterboarding online.
Researchers have studied criminal behavior and genetics for more than a century, and the findings are sometimes controversial.
"You should never feel scared to be at home, home should be your comfort place."
Forensic-psychology experts with the Profiling Project spent three months trying to confirm or debunk conspiracy theories about Democratic National Committee emails and WikiLeaks.
A tweet from the embassy comes days after a report that suggested Rich was a WikiLeaks informant, which has since been refuted.
Citing an unnamed "federal investigator," a Fox News report suggested that Rich gave 44,000 Democratic National Committee emails to WikiLeaks.