It had been a week, and Sherlock was close to giving up. He was no closer to finding the crucial, missing piece of evidence (the victim's neck tie after all) as he had been at the start of the case. The frustration was starting to get to him, his curls becoming frazzled around the edges and his behavior becoming more manic than usual. He swung from polar opposites, depressed and lethargic on the couch to wild and pacing between the kitchen and the restaurant at the end of Baker street. Lestrade had stopped asking him about it after the third attempt had found him with his nose nearly snapped off in a fit of Sherlockian rage.
John couldn't take much more of it. Pride be damned, he thought, as he started searching for help. "Professional finder" on google turned up a surprisingly promising lead- Promising until John read that the Finder was located in Florida. He was about to move on to something else, until he read at the bottom of Sherman's website, "Have case, will travel. Call for details."
Soon, Sherlock found John handing him the phone. "Who is this," he demanded quickly, crossing one arm over his chest.
A deep booming voice, American accent, answered quite calmly, "My name is Leo Knox, Mister Holmes, and I represent the answer to your problems."