Sherlock just-starting-out with his career in crime-solving doesn't mind pulling the strings available to him. Of course, once he gets older and establishes himself, such dependence is nonsense. (Mycroft didn't mind, though.)
Pulling Strings
"Sherlock," Lestrade growled, "if you're bullshitting me, I swear..."
"When have I ever been wrong?" replied Sherlock fiercely, jabbing a finger roughly at photograph of a bloodied body in an alleyway. "You asked me for an explanation, I just gave you one."
"But for God's sake, her sister...?"
"Past history suggests bitterness, jealousy, and rivalry," said Sherlock, shoving a photo of a young woman with olive skin at Lestrade. "Not mentally stable, either. Research!"
"Where did you find that out?"
Sherlock kept quiet, sipping his tea. He hated calling on favors from Mycroft, and worse, telling Lestrade that he had.
Prompt was #35: olive