Thumper set nineteen bombs before he actually killed anybody. “Nineteen!” Liz exclaimed. “And it wasn’t as if he wasn’t trying. He set them all over the five boroughs, and a couple in New Jersey—Jersey City and Fort Lee—for good measure. All dynamite, Canadian manufacture.”

But the score of the maimed and wounded was high. It had been closing in on fifty when he finally killed the man who picked the wrong Lexington Avenue pay phone. Every kaboom was followed by a note to the police responsible for the area where said kaboom occurred, and the notes were always the same: How do you like my work so far? More to come! THUMPER.

Before Richard Scalise (that was the pay phone man’s name), a long period of time went by before each new explosion. The two closest were six weeks apart. The longest delay was close to a year. But after Scalise, Thumper sped up. The bombs became bigger and the timers more sophisticated. Nineteen explosions between 1996 and 2009—twenty, counting the pay phone bomb. Between 2010 and the pretty May day in 2013 when Liz came back into my life, he set ten more, wounding twenty and killing three. By then, Thumper wasn’t just an urban legend, or an NY1 staple; by then he was nationwide.

He was good at avoiding security cameras, and those he couldn’t avoid just showed a guy in a coat, sunglasses, and a Yankees cap pulled down low. He kept his head low, too. Some white hair showed around the sides and back of the cap, but that could have been a wig. Over the seventeen years of his “reign of terror,” three different task forces were organized to catch him. The first one disbanded during a long break in his “reign,” when the police assumed he was finished. The second disbanded after a big shakeup in the department. The third started in 2011, when it became clear Thumper had gone into overdrive. Liz didn’t tell me all this on our way to Central Park; I found it out later, as I did so many other things.

Finally, two days ago, they got the break in the case they’d been waiting and hoping for. Son of Sam was caught by a parking ticket. Ted Bundy got caught because he forgot to put his headlights on. Thumper—real name Kenneth Alan Therriault—was nailed because a building super had a minor accident on trash day. He was wheeling a dolly loaded with garbage cans down an alley to the pickup point out front. He hit a pothole and one of the cans spilled. When he went to clean up the mess, he found a bundle of wires and a yellow scrap of paper with CANACO printed on it. He might not have called the police if that had been all, but it wasn’t. Attached to one of the wires was a Dyno Nobel blasting cap.

We got to Central Park and parked with a bunch of regular cop cars (another thing I found out later is that Central Park has its own precinct, the 22nd). Liz put her little cop sign on the dashboard and we walked down 86th Street for a little while before turning onto a path that led to the Alexander Hamilton Monument. That’s one thing I didn’t find out later; I just read the fucking sign. Or plaque. Whatever.

“The super took a picture of the wires, the scrap of paper, and the blasting cap with his phone, but the task force didn’t get it until the next day.”

“Yesterday,” I said.

“Right. As soon as we saw it, we knew we had our guy.”

“Sure, because of the blasting cap.”

“Yeah, but not just that. The scrap of paper? Canaco is a Canadian company that manufactures dynamite. We got a list of all the building’s tenants, and eliminated most of them without any fieldwork, because we knew we were looking for a male, probably single, and probably white. There were only six tenants who checked all those boxes, and only one guy who’d ever worked in Canada.”

“Googled ’em, right?” I was getting interested.

“Right you are. Among other things, we found Kenneth Therriault has dual citizenship, U.S. and Canada. He worked all sorts of construction jobs up there in the great white north, plus fracking and oil shale sites. He was Thumper, pretty much had to be.”

I only got a quick look at Alexander Hamilton, just enough to read the sign and note his fancy pants. Liz had me by the hand and was leading me toward a path a little way beyond the statue. Pulling me, actually.

“We went in with a SWAT team, but his crib was empty. Well, not empty empty, all his stuff was there, but he was gone. The super didn’t keep his big discovery to himself, unfortunately, although he was told to. He blabbed to some of the residents, and the word spread. One of the things we found in the apartment was an IBM Selectric.”

“That’s a typewriter?”

She nodded. “Those babies used to come with different type elements for different fonts. The one in the machine matched Thumper’s notes.”

Before we get to the path and the bench that wasn’t there, I need to tell you some other stuff I found out later. She was telling the truth about how Therriault finally tripped over his dick, but she kept talking about we. We this and we that, but Liz wasn’t a part of the Thumper task force. She had been part of the second task force, the one that ended in the big departmental shakeup when everybody was running around like chickens with their heads cut off, but by 2013 all Liz Dutton had left in the NYPD was a toehold, and only that much because cops have a kickass union. The rest of her was already out the door. Internal Affairs was circling like buzzards around fresh roadkill, and on the day she picked me up from school, she wouldn’t have been put on a task force dedicated to catching serial litterbugs. She needed a miracle, and I was supposed to be it.

“By today,” she went on, “every cop in the boroughs had Kenneth Therriault’s name and description. Every way out of the city was being monitored by human eyeballs as well as cameras—and as I’m sure you know, there’s plenty of cameras. Nailing this guy, dead or alive, became our number one priority, because we were afraid he might decide to go out in a blaze of glory. Maybe setting off a bomb in front of Saks Fifth Avenue, or in Grand Central. Only he did us a favor.”

She stopped and pointed at a spot beside the path. I noticed the grass was beaten down, as if a lot of people had been standing there.

“He came into the park, he sat down on a bench, and he blew his brains out with a Ruger .45 ACP.”

I looked at the spot, awestruck.

“The bench is at the NYPD Forensics Lab in Jamaica, but this is where he did it. So here’s the big question. Do you see him? Is he here?”

I looked around. I had no clue what Kenneth Alan Therriault looked like, but if he’d blown his brains out, I didn’t think I could miss him. I saw some kids throwing a Frisbee for their dog to chase (the dog was off his leash, a Central Park no-no), I saw a couple of lady runners, a couple of ’boarders, and a couple of old guys further down the path reading newspapers, but I didn’t see any guy with a hole in his head, and I told her that.

“Fuck,” Liz said. “Well, all right. We’ve got two more chances, at least that I can see. He worked as an orderly at City of Angels Hospital on 70th—quite a comedown from his construction days, but he was in his seventies—and the apartment building where he lived is in Queens. Which do you think, Champ?”

“I think I want to go home. He might be anyplace.”

“Really? Didn’t you say they hang around places where they spent time when they were alive? Before they, I don’t know, pop off for good?”