The night was dark and gloomy, the perfect backdrop for the case detectives Kate and Lucy were on. They had been tracking down a male suspect, a notorious conman who had managed to evade the authorities for years.

They finally managed to corner him in an abandoned warehouse. "Got nowhere to run now, do you?" Kate taunted, her voice echoing in the large, empty space.

The suspect, a man named Victor, smirked at them. "You think you've got me cornered? This is just the beginning." He flexed his muscles, flaunting his well-defined abs.

Lucy chuckled, "Impressive, but muscles won't save you from us." The detectives had a plan, an unconventional method to extract information from the cocky suspect.

They tied Victor to a chair using a thick rope. He looked at them in surprise, but didn't resist. "What's this, your new method of interrogation?" He laughed.

"You could say that," Kate replied with a smirk, pulling out a long, white feather. Victor's eyes widened slightly at the sight of it.

Lucy started to lightly tickle Victor's stomach with the feather, causing him to squirm and laugh uncontrollably. "What's this? The tough guy is ticklish?" She taunted.

Kate watched Victor's reaction closely. Every time the feather traced over a particular spot on his abs, he would flinch noticeably. "Interesting," she mused.

"What's so interesting?" Victor managed to ask through his laughter. Kate only smiled, her eyes focused on his stomach. She was onto something.

Lucy continued her tickling assault, moving the feather to the spot Kate had noticed. Victor's laughter increased, his body squirming more violently.

Suddenly, Kate's eyes widened. She noticed a small tattoo on Victor's abs, hidden under his shirt. It was the symbol of the gang they were investigating.

"Stop," Kate instructed Lucy. She pulled up Victor's shirt to reveal the tattoo. "Well, well, well. Looks like we've found our link."

Victor's smirk faded. He had been caught. The detectives' unconventional method had worked. The secret to cracking the case had been hiding in plain sight.

The women detectives laughed at the sight of the defeated suspect. "Not so cocky now, are you?" Lucy taunted, while Kate called for backup to take Victor into custody.

As they left the warehouse, Kate turned to Lucy. "I must admit, I was skeptical about the tickling interrogation, but it worked." Lucy grinned, "Sometimes, unconventional is the way to go."

The case of the notorious conman was finally solved. The detectives' unique method of interrogation had not only caught the suspect but also uncovered a crucial link to a larger investigation.

The tale of their unusual interrogation method soon spread around the station, making Kate and Lucy the talk of the town. But they only cared about one thing - justice was served.

That night, as they sat in their office, going through the evidence they had collected, they couldn't help but chuckle at the memory. It was a case they would never forget.

"Next time we have a tough nut to crack, we know what to do," Lucy said, holding up a feather. Kate laughed, "Yeah, we've got a secret weapon now."

They knew their unconventional method was not textbook detective work, but it had proven effective. Sometimes, to catch a suspect off-guard, you need to think out of the box.

And so, the tale of the tickling interrogation became a legend in the detective world. Kate and Lucy had not only solved a case but also introduced a new method of interrogation.

It was a reminder that the pursuit of justice sometimes requires unconventional methods. And in this case, a feather, a pair of ticklish abs, and two determined detectives were the perfect combination.

They realized that their strength was not just in their detective skills but also in their ability to adapt and innovate. And with this, they knew they were ready to take on any case that came their way.

As the night deepened and the city slept, the duo continued to work, their minds focused on the next case. They knew they had a long journey ahead, but they were ready.

Their story serves as a reminder that sometimes, the most unconventional methods can lead to the most surprising results. And in the world of detective work, surprises are always welcome.