Witnesses. D.D. wanted a short list from all the uniformed officers of any and all neighbors worth a second interview. She then assigned six homicide detectives to begin those interviews ASAP. If someone was a credible witness or potential suspect, she wanted them identified and talking in the next three minutes.

Cameras. Boston was riddled with them. City installed them to monitor traffic. Businesses installed them for security. D.D. formed a three-man team whose job was to do nothing but identify all cameras in a two mile radius and skim through all video footage from the past twelve hours, starting with the video cameras closest to the house and working out.

Known associates. Friends, family, neighbors, teachers, babysitters, employers; if someone had ever set foot on the property, D.D. wanted their name on her desk in the next forty-five minutes. In particular, she wanted all teachers, playmates, and caretakers of Sophie Leoni rounded up and cranked through the wringer. Full background checks, a search of their homes if the detective could talk his way through the door. Officers needed to be eliminating friends and identifying foes and they needed to be doing it now, now, now.

Other people out there knew this family. Enemies from the husband’s job, felons snagged in Trooper Leoni’s patrols, maybe partners in torrid affairs, or longtime personal confidantes. Other people knew Brian Darby and Tessa Leoni. And one of those people might know what had happened to a six-year-old girl who’d last been seen sleeping in her own bed.

Time was not on their side. Get out, hit the streets, beat the clock, D.D. ordered her crew.

Then she shut up and sent them back to work.

The Boston detectives scrambled. The brass nodded. She and Bobby returned to the house.

D.D. trusted her fellow investigators to begin the enormous task of sifting through all the nuances of an entire family’s existence. What she wanted most for herself, however, was to live and breathe the victims’ final hours. She wanted to absorb the crime scene into her DNA. She wanted to inundate herself with the tiniest little domestic details, from paint choices to decorative knickknacks. She wanted to set and reset the scene a dozen different ways in her mind, and she wanted to populate it with a little girl, a merchant marine father, and a state trooper mother. This one house, these three lives, these past ten hours. Everything came down to that. A home, a family, a collision course of multiple lives with tragic consequences.

D.D. needed to see it, feel it, live it. Then she could dissect the family down to its deepest darkest truth, which in turn would bring her Sophie Leoni.

D.D.’s stomach flip-flopped queasily. She tried not to think about it as she and Bobby once again entered the bloodstained kitchen.