(CNN) — A sheriff says he’s closer to finding the motive behind the fatal shooting of a Louisiana pastor who witnesses say was killed by a former deacon as the horrified congregation looked on.

Calcasieu Parish Sheriff Tony Mancuso said Tuesday the alleged gunman’s wife had filed a rape complaint with police against Tabernacle of Praise Worship Center pastor Ronald Harris on September 25, two days before the shooting.

In the complaint, the woman said Harris had raped her several months ago, according to Mancuso.

He declined to release the report, saying it was part of the murder investigation against former church deacon Woodrow Karey. Mancuso said he had not determined whether a rape had occurred.

READ MORE