Murders along the Coast

Simon Crofts is a Crime Scene Manager working at major incidents and overseeing the Scenes of Crime Officers under his command.
Their job is to deal with all types of crime from burglary to murder, in the seaside towns on the south coast.
A quiet festive period is interrupted by a call to the suspicious death of a baby. The traumatic scene and the subsequent post-mortem are all in a day's work for the SOCO's.
As their examination ends, they are then called to another scene, this time just as tragic.
A successful businessman and his wife have been shot dead in their own home.
There are no clues to who has carried out the shooting, or why.
The story follows the crime scene officers as they painstakingly carry out the thorough examinations of the house looking for that one tiny piece of evidence that will lead them to the suspect.
In this case it has been made more complicated, as it appears that the offender has been careful, and doesn't appear to have left any clues behind.
Crofts and his team have been faced with this type of challenge before and are confident that they will solve this case.
Will they succeed, or will the clever assassin get away with murder?