Murder on the Potomac. Alexandria series, #4

Private investigator Hank Walters is now asked to find out if a husband is planning on divorcing his wife to get at her 5 million dollar inheritance. Hank tracks the husband to find out if he has been cheating on his wife. A body is found to have been floating in the Potomac river and it may be the wife. Hank and his friend Detective Henry Brent begin the quest to find out if the husband murdered his wife and try to catch him.
This book is a novella, shorter than a novel, but longer than a short story. It's a quick read on a late night. Number 4 in the Alexandria series.