INDIANAPOLIS -- An Indianapolis police major suspended amid a federal investigation is expected to resign from the department and leave his seat on the City-County Council.

Indianapolis Public Safety Director Frank Straub told 6News' Jack Rinehart that he will meet with Maj. Lincoln Plowman and his attorneys Monday afternoon to accept the resignation.

Plowman was placed on administrative leave in early February after he refused to answer questions from FBI agents who came to his office, prompting an internal investigation, sources told Rinehart.

Under department policy, employees cannot refuse to cooperate in an investigation.

Plowman, a 23-year police veteran, works in the chief's office under the deputy chief for administration and commands the department's volunteer reserve division.

He also serves on the City-County Council as a Republican representing District 25 in Franklin Township.

Sources told Rinehart on Friday that Republican leadership on the council has contacted their members, indicating Plowman's resignation could come as early as Monday.

Plowman has been linked politically with millionaire investor Tim Durham, whose companies are at the center a fraud investigation by the FBI, but officials would not disclose the nature of the investigation involving Plowman.

Plowman and his attorney did not return calls for comment on Friday.