Capture by Roger Smith

Amazon

IN A CITY WHERE THE LINES BETWEEN RICH AND POOR ARE DRAWN IN BLOOD, THE TRUTH IS JUST THE LIE YOU BELIEVE THE MOST.
As four-year-old Sunny Exley drowns in the icy waters off a luxury beach house, her father, Nick, smokes weed on the shore and her mother, Caroline, is lost in the arms of a lover. Hidden on nearby boulders, rent-a-cop Vernon Saul watches the child die and chooses to act only when it is too late.
In the days following Sunny's death, gutted by grief and guilt, Nick falls under the spell of Vernon who presents himself as a friend in time of need. When the sinister Vernon's true motives are revealed, Nick is drawn into a spiral of manipulation and murder that leaves him fighting for his sanity and his life.