Here’s the police report. Read the second paragraph of page 2.
http://www.thesmokinggun.com/archive/years/2009/0723092gates1.html
parsy.
Exactly. Crowley was leaving. No arrest had been made. If Gates had any "questions", he could ask them outside.
At that point, Gates could have simply decided to end the confrontation. Since he (Gates) already demonstrated his understanding that he did not have to leave his home, any actions he took were voluntary. He was not "lured" outside in any sense.
Instead, Gates freely decided to follow Crowley out on to the porch, not for the purpose of "asking questions", but to continue the confrontation in a public space.