In light of the cases assigned in the reading this week, how might an officer abuse discretion under color of law?

Much has been said regarding the potential for police officers to abuse their ability to exercise discretion. In light of the cases assigned in the reading this week, how might an officer abuse discretion under color of law?
Consider, if you will, the nature of pretextual traffic stops as set forth in the Whren case. Or, consider, how/when a ‘stop and frisk’ may occur under the Terry doctrine.
Can an officer use these otherwise legal crime fighting tools to effectuate arrests based on underlying discrimination or bias? If so, how might this occur?
Be specific and make certain to cite to the language set forth in the cases assigned for this week.
This discussion prompt does not simply seek your opinion. You are to cite evidence from the assigned readings to justify your position using APA style.
Terry V. Ohio, 392 U.S. 1 (1968) Reasonable Articulable Suspicion
Whren v. United States 517 U.S. 806 (1996) Police Discretion in Practice: Traffic Stops
https://supreme.justia.com/cases/federal/us/392/1/
https://supreme.justia.com/cases/federal/us/517/806/