Trooper Leoni’s vintage two-bedroom bungalow was built into a hillside, white-dormered structure stacked over a redbricked two-car garage. A single flight of concrete steps led from the street-level sidewalk up to the front door and one of the largest yards D.D. had ever seen in downtown Boston.

Good family home. Just enough space to raise a kid inside, perfect lawn for a dog and a swing set outside. Even now, walking the lot in the dead of winter, D.D. could picture the cookouts, the playdates, the lazy evenings hanging on the back deck.

So many things that could go right in a house like this. So what had gone wrong?

She thought the yard might hold the key. Big, sprawling, and completely unprotected in the midst of population overload.

Cut through the school parking lot, walk onto this property. Emerge from behind four different apartment buildings, walk onto this property. You could access the Leoni residence from the back street, as D.D. had done, or by walking up the concrete steps from the front street, as most of the Massachusetts state police seem to have done. From the back, the front, the right and left, the property was easy to enter and easier to exit.

Something every uniformed officer must have figured out, because instead of studying a pristine sweep of white snow, D.D. was currently looking at the largest collection of boot imprints ever amassed in a quarter acre.

She hunched deeper into her winter field coat and exhaled a frustrated puff of frosty breath. Fucking morons.

Bobby Dodge appeared on the back deck, probably still searching for his vantage point. Given the way he was frowning down at the mucked-up snow, his thoughts mirrored her own. He caught sight of her, adjusted his black brimmed hat against the early March chill, and walked down the deck stairs to the yard.

“Your troopers trampled my crime scene,” D.D. called across the way. “I won’t forget that.”

He shrugged, burying his hands in his black wool coat as he approached. A former sniper, Bobby still moved with the economy of motion that came from spending long hours holding perfectly still. Like a lot of snipers, he was a smaller guy with a tough, sinewy build that matched his hard-planed face. No one would ever describe him as handsome, but plenty of women found him compelling.

Once upon a time, D.D. had been one of those women. They’d started out as lovers, but discovered they worked better as friends. Then, two years ago Bobby had met and married Annabelle Granger. D.D. hadn’t taken the wedding well; the birth of their daughter had felt like another blow.

But D.D. had Alex now. Life was on the up. Right?

Bobby came to a halt before her. “Troopers protect lives,” he informed her. “Detectives protect evidence.”

“Your troopers screwed my scene. I don’t forgive. I don’t forget.”