The RCMP recently ended its probe into Nigel Wright, the prime minister's former chief of staff, who gave Duffy $90,000 so the senator could repay his ineligible expenses.
The documents filed in court on May 27 allege that Duffy committed "fraud and breach of trust" by filing expense claims for secondary accommodations in Ottawa.
Cpl. Greg Horton, the RCMP chief investigator, said he believes these documents will show that Duffy's "primary residence is in Ottawa, not P.E.I."
The RCMP are seeking all hotel room rental and folio information for Duffy and his wife Heather Duffy between Jan. 1, 2009, and May, 26, 2014.
More to come