The testimony came the same day that Michigan prison officials ordered Kilpatrick to wear an electronic tether and live with his mother while they investigate whether he violated parole by failing to report a $2,000 cash gift from a Chicago minister.
Derrick Miller said Thursday the money came from developers and was solicited by Kilpatrick. Prosecutors have now turned Miller over to defense attorneys for cross-examination.
Kilpatrick, his father Bernard and pal Bobby Ferguson are charged with rigging contracts and taking payoffs. Miller was a defendant, too, until pleading guilty to corruption in 2011.
Miller has known Kilpatrick since high school and served as Detroit's chief administrative officer when Kilpatrick was mayor. He answered questions from prosecutors over three days, telling jurors that he collected thousands of dollars in bribes for Kilpatrick and supported Ferguson's efforts to get city business.
Kilpatrick is on parole for a 2008 state conviction for obstruction of justice and could be sent back to prison. Kilpatrick owes $800,000 to Detroit and must report his income.
He received a $2,000 wire transfer in December from the Rev. Corey Brooks of New Beginnings Church.
Parole agents interviewed Kilpatrick on Thursday before the state issued the order. His mother is ex-U.S. Rep. Carolyn Cheeks Kilpatrick.
The Corrections Department has posted a video online of Kilpatrick getting the cash at a suburban Walmart store.