Pomeroy scratched his head. “Now that you mention it, maybe so. At least he might be worth talking to.”

“Why is that?”

“Well, we’ve had a lot of trouble with him for years. Indecent exposure, lewd behavior, that kind of thing. A couple of years ago it was window peeping, and he spent some time in the Delaware Psychiatric Center. Last year he got obsessed with a high school cheerleader, wrote letters to her and stalked her. The girl’s family got a court injunction, but he ignored it. So he did six months in prison.”

“When was he released?” she asked.

“Back in February.”

Riley was getting more and more interested. Dennis Vaughn had gotten out of prison shortly before the killings had started. Was it merely a coincidence?

“Local girls and women are starting to complain,” Pomeroy said. “Rumor has it that he’s been snapping pictures of them. It’s nothing we can arrest him for – at least not yet.”

“What else can you tell me about him?” Riley asked.

Pomeroy shrugged. “Well, he’s kind of a bum. He’s maybe thirty years old and he’s never held down a job that anybody can remember. Sponges off family he’s got here in town – aunts, uncles, grandparents. I hear that he’s been real sullen lately. Holds it against the whole town that he had to do prison time. He keeps telling folks, ‘One of these days.’”

“‘One of these days’ what?” Riley asked.

“Nobody knows. Folks have started calling him a ticking bomb. They don’t know what he might do next. But he’s actually never been violent that we know of.”

Riley’s mind was racing, trying to make sense of this possible new lead.

Meanwhile, Bill and Lucy had finished talking to the man and were walking toward Riley and Pomeroy.

Bill’s face looked bright and confident – a sudden change from his recent gloomy demeanor.

“Dennis Vaughn’s our killer, all right,” he told Riley. “Everything the guy just told us fits the profile perfectly.”

Riley didn’t reply. It was starting to seem likely, but she knew better than to jump to conclusions.

Besides, the certainty in Bill’s voice made her nervous. Ever since she’d arrived here this morning, she’d felt like Bill was teetering on the brink of really erratic behavior. It was understandable given his personal feelings about the case, especially his guilt over not solving it sooner. But it could also get to be a serious problem. She needed him to be his usual rock-solid self.

She turned toward Pomeroy.

“Could you tell us where to find him?”

“Sure,” Pomeroy said, pointing. “Walk straight along Main Street until you get to Brattleboro. Turn left, and his house is the third one to the right.”

Riley told Lucy, “You stay and wait for the medical examiner’s team. It’s fine for them to take the body right away. We’ve got lots of photographs.”

Lucy nodded.

Bill and Riley walked toward the police tape, where reporters craned toward them with cameras and microphones.

“Does the FBI have a statement to make?” asked one.

“Not yet,” Riley said.

She and Bill ducked under the tape and pushed their way among the reporters and onlookers.

Another reporter yelled, “Does this killing have anything to do with the murders of Metta Lunoe and Valerie Bruner?”

“Or with Meara Keagan’s disappearance?” another asked.

Riley bristled. It wouldn’t be long before the news was widespread that there was a serial killer in Delaware.

“No comment,” she snapped at the reporters. Then she added, “If you keep following us I’ll arrest you for interfering with an investigation. It’s called obstruction of justice.”

The reporters backed away. Riley and Bill disentangled themselves from the small crowd and continued on their way. Riley knew they wouldn’t have a lot of time on this case before other, more aggressive reporters arrived on the scene. They were likely to have a lot of media attention to deal with.

It was a short walk to Dennis Vaughn’s house. After just three blocks, they got to Brattleboro and turned left.

Vaughn’s house was a dilapidated little ruin with a heavily dented tin roof, peeling white paint, and a sagging front porch. The lawn was knee-deep with grass and weeds, and an old, decrepit-looking Plymouth Valiant was parked in the driveway. The vehicle was certainly large enough for the transportation of emaciated corpses.

Bill and Riley walked up onto the porch and knocked on the screen door.

“Whaddya want?” called a voice from inside.

“Are we speaking to Dennis Vaughn?” Bill answered.

“Yeah, maybe. Why?”

Riley said, “We’re with the FBI. We want to talk to you.”

The front door opened. Dennis Vaughn stood behind the screen door, which was still hooked shut. He was an unsavory-looking young man, overweight, with a shaggy beard. Excessive body hair showed under his torn, food-stained undershirt.

“What’s this all about?” Vaughn asked in a petulant, quavering voice. “Are you here to arrest me or what?”

“We’ve just got some questions,” Riley said, showing her badge. “Could we come inside?”

“Why should I let you in?” Vaughn asked.

“Why shouldn’t you let us in?” Riley asked. “You don’t have anything to hide, do you?”

“We could come back with a warrant,” Bill added.

Vaughn shook his head and growled. He unhooked the screen door and Bill and Riley stepped inside.

The house was even more of a wreck inside. The wallpaper was peeling, and there were broken gaps in the floorboards. There was hardly any furniture – just a couple of battered straight-back chairs and a couch with its stuffing hanging out. Plates and bowls were scattered everywhere, some of them filled with moldy food. Disagreeable smells filled the air.

What caught Riley’s eye were dozens of photographs randomly thumbtacked to the walls. All of them were of women and girls in casual, unsuspecting poses.

Vaughn noticed Riley’s interest in the pictures.

“It’s my hobby,” he said. “Is there anything wrong with that?”

Riley didn’t reply, and Bill said nothing. Riley doubted there was anything illegal about the pictures themselves. It looked as if they’d all been taken outdoors in public places in broad daylight, and none were actually indecent. Even so, the very act of snapping pictures of girls and women without their knowledge or consent struck Riley as deeply creepy.

Vaughn sat down on a wooden chair that creaked under his weight.

“You’re here to accuse me of something,” he said. “So why don’t you get on with it?”

Riley sat down on another rickety chair facing him. Bill stood beside her.

“What do you think we’re here to accuse of you of?” she asked.

It was an interview technique that had worked well for her in the past. Sometimes it was best not to start with direct questions about a case. Sometimes it was better to get a potential suspect talking until he tripped himself up with his own words.

Vaughn shrugged.

“One thing or another,” he said. “It’s always something. Everybody always misunderstands.”

“Misunderstands what?” Riley asked, still trying to coax him along.

“I like girls, okay?” he said. “What guy my age doesn’t? Why do people think everything I do is wrong just because I do it?”

He glanced around at some of the pictures, as if he hoped they’d say something to defend him. Riley just waited for him to keep talking. She hoped that Bill would do the same, but her partner’s impatience was tense and palpable.

“I try to be friendly with girls,” he said. “Can I help it if they don’t understand?”

His voice was slow, even a bit sluggish. Riley felt pretty sure he wasn’t drunk or drugged. Perhaps he was a bit mentally slow or had some neurological problem.

“Why do you think people treat you differently?” Riley said, trying to sound almost sympathetic.

“How should I know?” Vaughn said, shrugging again.

Then in an almost inaudible sullen voice he added …

“One of these days.”

“‘One of these days’ what?” Riley asked.

Vaughn shrugged yet again. “Nothing. I don’t mean anything. But one of these days. That’s all I’m saying.”

Riley felt encouraged that his talk was becoming nonsensical. That often happened before a suspect really betrayed himself.

But before Vaughn could say anything else, Bill stepped toward him menacingly.

“What do you know about the murders of Metta Lunoe and Valerie Bruner?”

“I never heard of them,” Vaughn said.

Bill bent uncomfortably close to him and peered into his eyes. Riley was worried now. She wanted to tell Bill to knock it off. But interfering might make things worse.

“What about Meara Keagan?” Bill asked.

“Never heard of her either.”

Bill was talking more loudly now.

“Where were you last Thursday night?”

“I don’t know.”

“You mean you weren’t at home?”

Vaughn was sweating nervously. His eyes were wide with alarm.

“Maybe I wasn’t. I don’t keep track. I go out sometimes.”

“Where do you go?”

“I go driving around. I like to get out of town. I hate this town. I wish I could live someplace else.”

Bill spat his next question in Vaughn’s face.

“And where were you driving around last Thursday?”

“I don’t know. I don’t even know if I was driving around that night.”

“You’re lying,” Bill shouted. “You were driving around Westree, weren’t you? You found a nice lady there, didn’t you?”

Riley shot out of her seat. Bill was clearly out of control now. She had to stop him.

“Bill,” she said quietly, grabbing him by the shoulder.

Bill shoved away her hand. He pushed Vaughn over in the chair. Already on the verge of breaking, the chair fell to pieces. Vaughn was sprawled on the floor for a moment. Then Bill grabbed him by the undershirt and hauled him across the room, pushing him back first against the wall.

“Bill, stop it,” Riley shouted.

Bill was pressing Vaughn against the wall. Riley was afraid he might pull his gun at any second.

“Prove it!” Bill snarled.

Riley managed to get between Bill and Vaughn. She pushed Bill back forcefully.

“That’s enough!” she snapped loudly. “We’re leaving!”

Bill was staring at her, his eyes wild with rage.

Riley turned to Vaughn and said, “I’m sorry. My partner’s sorry. We’ll go now.”

Without waiting for Vaughn to say anything, Riley shoved Bill toward the front door, then out onto the porch.

“What the hell’s the matter with you?” she hissed at him.

“What’s the matter with you? Let me back in there. We’ve got him. I know we’ve got him. We’ll make him show us his driver’s license, find out what his middle name is.”

“No,” Riley said. “We’re not going to make him do anything. Jesus, Bill, you could lose your badge for acting like that. You know better.”

Bill looked like he couldn’t believe his ears. “Why?” he demanded. “We’ve got him. We could get a confession.”

Riley felt like shaking him.

“We don’t know that. Maybe he is our guy, but I don’t think so.”