HARTFORD, Conn. (AP) – As authorities continue investigating public corruption, former Gov. John G. Rowland was transferred from prison to answer questions from federal prosecutors on Tuesday.

“Rowland appeared today pursuant to a lawfully issued subpoena and responded to questions,” his attorney, R. Bartley Halloran, said as he left the U.S. Attorney’s office Tuesday afternoon. “I can’t respond to the specific areas. He has testified and testified truthfully.”

Assistant U.S. Attorney Nora Dannehy, who led the Rowland probe, has said the investigation is not over. One of the outstanding matters includes the investigation into millionaire businessman Robert V. Matthews, who prosecutors said purchased Rowland’s condominium through a straw buyer for more than it was worth.

The middleman in that deal, Wayne Pratt, is cooperating against Matthews and his attorney said Tuesday that Rowland’s appearance in Hartford likely was related.

“It’s most likely related to the ongoing federal investigation of the relationship between the governor and Mr. Matthews,” attorney Thomas Dwyer said.

Matthews’ attorney did not return a message seeking comment.

Early this month, The Associated Press reported that Dannehy was investigating Rowland’s former public works chief, Ted Anson, for lying to investigators. Anson’s attorney also had no comment.

Rowland, in prison for corruption the past 10 months, was transferred from a Pennsylvania prison camp Monday, a prison spokesman said Tuesday.

Rowland left Loretto Federal Correctional Institution on an order from a federal judge, said Mike Truman, spokesman for the Federal Bureau of Prisons. Halloran said Rowland is due to return to Pennsylvania on Tuesday night.

Rowland was sentenced last year on a corruption charge after reaching a plea agreement with prosecutors. He is due to be released from prison Feb. 12.

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Associated Press writer John Christoffersen in Stamford contributed to this report.