A Study in White
John hated Christmas. Mainly because his one serious girlfriend had broken things off over the holidays. He also hated the fact he had to drag a toddler to a crime scene. Sherlock was absolutely awful at Christmas; he had insisted they walked to the millennium bridge, which was closed off due to a body being found on it early this morning. He spent the whole journey kicking up snow and throwing snowballs at John. John had to resist the urge to punch him. After a particularly annoying snowball to the face John had ran at Sherlock and tackled him to the ground, which unfortunately only made Sherlock giddier, and earned them very strange looks from the passersby. After that John had just grumbled at dodged until they had arrived at the bridge.
Lestrade was stood waiting at the bridge, surrounded by three police cars and a barricade to keep away the reporters and the public. Sally Donovan muttered insults as they both passed under the tape, Sherlock completely ignoring her, in the middle of explaining to John the importance of snow, not that he was listening.
Lestrade explained the case to both of them. The woman had been found on the bridge at 3am, head bashed in. They had no suspects, and apart from the body, no evidence. Sherlock's smile vanished as Lestrade explained, and his brow knitted into a frown.
"You have taken me away from Baker Street for this?"
Lestrade looked confused. "Well of course, we have no leads; we need you to figure this out!"
Sherlock snorted. "Arrest the boyfriend."
"Oh come on Sherlock, you're being ridiculous now. Are you going to give us something to go on or not?"
"Since its Christmas, I'll let you off for being so stupid" smirked Sherlock. "You have failed to pick up on the fact it didn't start snowing until 2am, and around that time very few walk across this bridge, especially in cold windy weather. There are a clear set of footprints here, high end trainers, size ten. Look at her, her style of dress, she is easily a footballer's girlfriend, and the boot prints clearly lean towards someone of that profession. Judging by smudged lipstick she was kissing someone, but not going home with them, hence the smudges, she tried to pull away. Perhaps the boyfriend got to keen, perhaps she wanted to break up. Who knows, humans are boring. What's important here is that the boyfriend followed her across the bridge, most likely in a heated argument, and bludgeoned her to death, hoping the weather would cover his tracks."
Lestrade stood there open mouthed.
"Now go do your job. Come along John, I want to build at least two snowmen before Mrs Hudson has finished baking her Christmas cake!"