As the sun began to set, the marine helicopter banked away from the Mississippi River and out over the small town of Port Sulphur. From the air, there was not much to distract Lorna from her mode of transportation. If she kept this up, she might even get used to air travel, but her sweaty palms and shallow breathing defied any such accommodation now.

To offset her fright, she concentrated on the passing landscape below, marking landmarks, estimating how long she had to remain airborne.

Below, Port Sulphur was easy to miss, covering less than six square miles, protected by a weathered and battered levee system. It had once been a rugged company town serving Freeport Sulphur, but in the nineties, after drilling and refinery operations had shut down, the town had begun a slow decline, waiting only for Katrina to write its epitaph. A twenty-two-foot wall of water had swept through the town, all but wiping the place away. Of the three thousand or so residents, only a small fraction had returned to their flooded homes.

If Lorna hadn’t been studying the world below with such anxiety, she might have missed the place. They were past the town in seconds and over water again-a wide shallow lake called Bay Lanaux. They began a fast descent. It had been a short flight, covering the forty miles as a crow flies from New Orleans in less than fifteen minutes. Short as it was, Lorna was still ready to get out of this bird.

Tense, she jumped slightly when Jack’s amplified voice cut into her headphones. He sat up front with the pilot. She shared the back with two other CBP agents. They had told her their names, but she had already forgotten, her mind too occupied with keeping the helicopter flying by sheer willpower.

“We’ll be taking a CBP boat into the canals south of the lake,” Jack explained. “The boat will act as the base of operations for this mission. Two smaller airboats will flank our path, canvassing the smaller byways and channels to either side. And in case they’re needed, we have a pair of canoes for tighter places.”

Lorna stared out at the gathered maritime force as the helicopter settled to its floats in the water. A second, larger helicopter lifted off from the lake. It had carried in more of Jack’s team, along with some local talent. The CBP boat nearby looked to be the same one from earlier, an Interceptor-class craft made for inland or ocean travel. A pair of smaller airboats circled farther out, propelled by their giant fans, whisking swiftly over the water.

After they landed, chaos ruled as men and weapons were ferried from chopper to boats. Reaching the aft deck of the CBP boat, Lorna found herself mostly in the way, tussled by big, rugged men smelling of cheap aftershave, leather, and gun oil. Rough voices barked around her or burst with laughter.

She moved to a quiet corner, away from the tornado of testosterone.

Nearby, a half-dozen men in dark green shirts and trousers-Jack’s Special Response Team-bustled about securing weapons: sidearms, shotguns, assault rifles. Night-vision goggles sat atop their helmets. No one was taking any chances.

Three other men dressed in hunting vests and jeans shared the back of the boat, but they kept to the other side, sitting atop overturned canoes. Lorna recognized the flat-bottomed dugouts to be Cajun pirogue. All three men-two black, one white-definitely had the rangy look of backwater Cajuns. One vaguely resembled Jack, maybe a relative. While dating Tommy, she had never met all of the Menard clan.

The final member sharing the boat came waltzing up, tongue lolling, tail wagging. It was a purebred bloodhound, but even the dog’s manner was cocky with a happy-go-lucky glint in his eyes that was pure Cajun.

“Burt,” she whispered to herself as memories of happier times swelled through her. She might not have met Tommy’s older brother, but she had been introduced to the family’s best hunting dog.

Jack had mentioned bringing a scent hound along for the hunt, but she never thought it would be Burt.

Glad for some friendly greeting, she knelt to accept the dog’s attention. He ambled up, shaking a bit of drool. She reached out a hand to scratch behind one of his impossibly long ears-but a sudden sharp shout froze them both.

“Burt! Git your butt back over here! Leave that bonne à rien alone.”

The dog glanced over his shoulder and dropped his tail. With a reluctant, almost apologetic glance at Lorna, Burt turned and returned to the trio by the canoes.

The one who had barked the order glared over at her. It was the man who bore a resemblance to Jack, probably related. Lorna didn’t understand what he had called her-bonne à rien-but from the sneer in his voice, it wasn’t a flattering term.

Jack had been talking to his second-in-command, but he swung around fast and came at the other. He grabbed the man by the collar of his flannel shirt and pulled him nose to nose.

“If I ever hear you talk to Dr. Polk like that again, I’ll toss your ass overboard. Brother or not. She’s here at my request. Stow that attitude or get off my boat.”

Lorna stared harder at the two. Brother? She studied the other man with new eyes. That would make him Randy, the older brother of Jack and Tom. He had been in jail when she and Tom were dating, incarcerated for a year after a drunken brawl in a pub on Bourbon Street. It didn’t help that he had slugged an off-duty policeman.

Randy seemed about to argue, and even placed a palm on Jack’s chest as if to shove his brother away. But he must’ve read something in Jack’s face. His arm fell away. He took a step back and tried to shrug it off with a halfhearted acknowledgment.

“You’re the boss, little brother.”

Not satisfied, Jack held him a moment longer, letting his intensity burn.

Randy finally sagged. “Mais oui! All right! I heard you!”

Jack let him go and glanced to Lorna in the same apologetic way as the hounddog. The brother returned to his friends. The trio retreated to the far side of the canoes. Once Jack finished with orders for his second-in-command, he joined Lorna.

“Sorry about that. C’mon. Before you cause any more trouble, let me show you the layout for tonight’s search. See if you can offer any advice. That’s why you’re here, isn’t it?”

She rankled a bit at his surliness, but she kept her mouth shut. She followed him toward the pilot’s cabin of the boat. As he held the door for her, she was surprised to discover that the cabin was air-conditioned, almost chilly compared with the persistent heat of the evening. The sun had set, but the western sky still glowed a rosy orange.

He led her to a chart table. The only other occupant in the cabin was the ship’s pilot, dressed like all of Jack’s men in the CBP rough duty uniform, minus the helmet. The ship was already headed across Bay Lanaux. The trundle of the engine vibrated the deck through her hiking boots. The line of bayou forest stretched ahead of them, looking impenetrable and dark.

“Here’s the route we’re taking.” Jack placed a palm on a map clipped to the table. He ran a finger down a line drawn on the chart. “After the storm, we estimate the cat made landfall near Bay Joe Wise then headed due north.” His finger stopped. “Here is where we rescued the boy. That cat covered a lot of ground in a short time.”

Lorna had already heard the details about that fatal encounter. She took a deep breath, glad to fall back on her professional background.

“Jaguars hunt a wide territory,” she started. “That’s why she’s on the move. She’s genetically wired to keep moving until she finds a spot that she believes will support her.”

“So she could keep moving for a while?”

“Definitely. This migratory trait is one of the reasons jaguars are endangered in the wild. Their native jungles and forests are being encroached upon and broken apart by man. With this strong drive to roam, the breakup of their forests was driving them into deadly encounters with people.”