Neither the government nor the Senate have responded yet but conventional wisdom suggests that Duffy has a pretty good case.

After being exonerated on all 31 counts of bribery, breach of trust and fraud, Sen. Mike Duffy is suing the government.

Ethics Commissioner Mary Dawson says she considers Nigel Wright's actions "undoubtedly improper'' and a violation of ethics rules.

Ethics commissioner Mary Dawson has revealed that she continues to examine the conduct of Nigel Wright, former prime minister Stephen Harper's one-time chief of staff.

The investigation into Nigel Wright, formerly Prime Minister Stephen Harper's chief of staff, resumed last week.

Duffy was acquitted in April on 31 criminal charges, including fraud, breach of trust and bribery, stemming from his Senate expenses.

Sen. Mike Duffy, recently acquitted of 31 charges including bribery, fraud and breach of trust, has returned to Parliament Hill.

Ontario Justice Charles Vaillancourt blasted the conduct of the Prime Minister’s Office under Stephen Harper calling it “mind-boggling and shocking” in his ruling on Mike Duffy Thursday.

All 31 charges against Mike Duffy have been dismissed.

Global News' live coverage Thursday of the Mike Duffy verdict.