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.
The suspect identified as the driver of a truck that killed four people had expressed sympathy with the Islamic State militant group.
The device was found near a multi-ethnic neighborhood that is home to bars and restaurants.
Was Putin's presence linked to the timing and what history does the city have of extremism?
The Council on American-Islamic Relations called for an investigation into the incident and said that it had recorded 34 cases of mosques being vandalized since the beginning of the year.
The man who killed three people in an attack outside London's House of Parliament has been named as Khalid Masood.
Organization for Security and Cooperation in Europe also fell victim to a cyber hack that used tools attributed to a Russian group.