During an investigation, Salgado barely sleeps. When it's over, he crashes hard. Twice, dentists prescribed mouth guards to keep him from grinding his teeth. He chewed through each in a week.
"None are alike, and they're all the same," Salgado said. "You don't know what to expect, but you know what to expect."
With that in mind, Salgado set out that night in a pickup truck with Andres.
Few west Phoenix residents perceived the ballet of two unwitting suspects and dozens of officers that silently swept back and forth through their neighborhood.
Kidnappers called to tell Salgado and Andres to drive around with their windows down. They ordered them to stop at a gas station, then to get out and raise their shirts. Other officers watched from the shadows, giving them a wide berth.
For more than an hour kidnappers ordered Salgado and Andres through maneuvers, looking for signs of cops, apparently unaware of the undercover officers silently cruising the area looking for the kidnappers.
Then things happened fast. Officers were following a suspicious bronze Chevy truck, when the driver bolted down a residential street and into a driveway. Two men jumped out and ran. One dropped a gun.
Officers grabbed them after a short chase and before they could call their accomplices. If anything happened to Perez-Torres, officers said, they'd be charged with murder. The two men caved. He was being held, they said, in a house in Mesa, half an hour away.
A caravan of cops now sped for Mesa. They got there as three men were pushing Perez-Torres into a brown truck; a black Chrysler idled nearby. Both sped off but didn't get far. Police arrested three more men.
By 9:30, Juan Perez-Torres was safe, and five of his alleged kidnappers were about to be questioned.
They told detectives a bleak border tale.
Max Portillo, 24, said he'd been having trouble with a drug smuggler in Nogales, Mexico, known as "El Chueco" -- Twisted. El Chueco said Perez-Torres owed him for a load of marijuana, and he wanted someone to kidnap him.
Portillo said he recruited the others at bars. Another suspect, Abel Mosqueda, said he met Portillo at El Gran Mercado. Mosqueda told detectives he was out of work and needed money. Among the five of them, they had one gun: a black .45. They said they'd never kidnapped before.
How much of it was true? "That voice," Gina Garcia said, "I'm sure he's done this before from the way he conducted the negotiation."
But detectives hadn't time for the case's murky motives. They had the kidnappers' confessions and other evidence. Prosecutors had been getting plea-bargains of 12 years in prison for less. In a few months, they'd have trouble remembering the case.
Detectives now check victims for warrants and have dogs sniff ransom money for drugs, under the theory that today's victims are tomorrow's suspects. They've seized property valued at close to $1 million.
Phoenix police say they have never lost a victim during a rescue attempt. But detectives wondered how long their record would hold, and how long they could stave off the violence that has left more than 8,000 people dead in Mexico in the last two years.
"The way I understand it, the vice president of the Bank of Mexico has to go to work with armed escorts," Sgt. Roberts said. "The vice president of Wells Fargo in Phoenix does not. We're trying to prevent that from happening. If the United States as a whole doesn't do something about this, it's possible it could go that way."
About 4 a.m. Saturday, the family of Juan Francisco Perez-Torres huddled in the police lobby, waiting to drive him home. He denied smuggling drugs. Fixing and selling used cars was how he made his money, he said. No detective believed him.
Six hours later, Garcia finally went home. She hadn't slept in more than a day. Nonetheless, she had passed up a chance to move up to sergeant.
"It's good to save people, and it's good to put people away," she said.
The job was in Salgado's blood as well, and he couldn't quit it.
"The thing about kidnapping is," he said, "it's the only crime that's occurring as it's being investigated."
This one was now done.