Conversation so far:
What Happened to Imam?
American authorities arrested imam Ahmad Wais Afzali, who was charged with and convicted of lying to the FBI about a conversation in which Afzali informed Zazi he was under surveillance.
Was Imam Ahmad Wais Afzali in America illegally?
Afzali was formerly a resident of Flushing, Queens, and legal permanent resident of the U.S., born in Kabul, Afghanistan.
Did Imam Ahmad Wais Afzali serve time after being arrested?
As part of his plea agreement, Afzali voluntarily left the U.S. in July 2010, within 90 days of his conviction.

Question: When did this happen like dates or year?
Self-contained rewrite: When did this happen like dates or year?