William Parkin

William Parkin is an associate professor in the Department of Criminal Justice at Seattle University and co-investigator for the U.S. Extremist Crime Database.

Oklahoma City police officers salute 19 April during a moment of silence at a memorial service held on the first anniversary of the bombing of the Alfred P. Murrah Federal Building as they face the fence surrounding the bomb site. In the background are buildings destroyed in the blast that killed 168 adults and children. (CHRIS WILKINS/AFP via Getty Images)

Far-right extremist violence and American presidents: The pattern isn’t what you’d think

William Parkin, Jeff Gruenewald, Colleen Mills

In this undated photo provided by the Federal Bureau of Investigation Joseph D. Jones, left, and Edward Schimenti pose in front of an Islamic State group flag. Jones and Schimenti were arrested by FBI agents on Wednesday, April 12, 2017 on terrorist charges for allegedly conspiring to support the Islamic State militant group. (FBI via AP) (AP)

Did far-right extremist violence really spike in 2017?

William Parkin, Joshua D. Freilich, Steven Chermak

Extremism from both sides: What does the research tell us about Islamist extremism and far-right extremism?

William Parkin, Brent Klein, Jeff Gruenewald, Joshua D. Freilich, Steven Chermak