Murder in the Palais Royal (Aimee Leduc Investigations #10) by Cara Black; 2010. Hardcover

Someone impersonating Parisian P.I. Aimée Leduc shoots her partner, René, and eyewitnesses identify Aimée as the culprit. She must clear herself and find the shooter before she finishes the jobJust as Parisian private investigator Aimée Leduc is about to leave for New York City to pursue a lead on a man who might be her brother, her fellow detective, René Friant, is wounded by a near-fatal gunshot. Aimée is distraught over René’s condition and horrified to be under suspicion for the attack; police have pegged her as the guilty party. At the same time, a large, mysterious sum appears in Leduc Detective’s bank account, and tax authorities descend upon Aimée. It seems someone is impersonating her—someone who wants revenge. But for what?