Brotherly Love

Romo Lindy had recently retired as a homicide detective when he received a phone call from his nephew, Tyler, who lived in Philadelphia, telling him that, Paul, Tyler's dad and Romo's brother, had been murdered. Paul was an Internal Affairs Officer with the Philadelphia Police Department. He had been working on a case that involved corruption within the department, knowing it could lead to his own death.
Paul knew Romo would take over if he were to be murdered, so he left clues about the investigation only his brother would understand, in hopes of identifying and indicting his killer