The Ghost of Christmas Past

Presently I am searching Literary Agencies for someone to take on my book. If successful, I will need it promoted. It's a fictional retelling of an original NYPD cold case, a murder of a brilliant black youth as he left midnight Mass on Christmas Eve 1977. Three determined detectives, two white and one black, from the Robbery Squad are deterihsmined to get the killer, which the do in 1983-85