Experiments (Sherlock BBC- Johnlock Fanfic)

20- The next death

First of all, I'd like to thank anyone who is reading this! This story nearly has 700 reads, which is bonkers, so thanks!

~Sherlock~

'In honour or my mother.' The words burned into my brain. A woman, with white hair pulled back into a tight bun lay dead on top of a horrendous floury bed. Recently widowed, she lived in a small cottage on the outskirts of London with her small dog.

The cause of death remained the same, the old lady had been gassed by a mixture of bleach and ammonia which had been mixed in her bathroom. As usual, no evidence was left, aside from the engraving on the wall.

"John I do not understand," I groaned quietly, tugging my hair.

A smug Anderson walked into the room laughing. He was sporting a dishevelled beard, and had a crazy look in his eyes.

"Oh my, the great Sherlock Holmes can't solve the case!"

"Anderson, good to see you actually decided to show up for work! It's a pity to see that your girlfriend can't do the same."

He jumped and his eyes widened as he looked at me. My comment had obviously caught him off guard. There was no doubt he knew about Donovans disappearance from work, but currently I had much more important things to worry about.

"Come to think of it I haven't seen Donovan since the second murder. You wouldn't know anything about that would you sherlock?" A wide grin crept across his face.

My mind started whirring and connecting dots. Come to think of it, the second victim, the dark skinned female had a distinct likeness to Donovan.

"Sherlock!" Called John from the hallway. Those thoughts would have to wait.

He appeared in the doorway of the bedroom, nose pink from the cold, dustings of snow on the shoulders of his jumper. He looked quite adorable.

"I got you this," he said as he held out a coffee for me. I smiled at him and our fingers brushed as I took it from him, sending shivers up my spine.

Slightly dazzled, I turned back to anderson. He was hysterically laughing.

I furrowed my brows and looked at John who gave me a look. Anderson made no indication of stopping any time soon. With a sigh, John grabbed his arm and led him outside. I could hear whispers of John attempting to calm the clearly deranged man down to no avail.

Half an hour later, I was thoroughly dusting for prints as John walked in.

"Sherlock he's gone balmy. He was saying some weird stuff and laughing. I sent him home."

I didn't stop my work to reply.

"So uhh... what's up with the writing? What do you reckon did it."

I have an exasperated sigh and stood up to face him. I did not want to stop my work to talk to him. He was too distracting.

Before I could act to harshly, I heard Donnas voice in my head.

'You're hurting him.'

With another sigh, I tried to explain it to him in a voice that wasn't too sarcastic.

"John I don't know. It doesn't leave any type of residue, it's not anything overly sharp. Most metals, knifes and such leave small molecular traces, especially on hard surfaces where excess pressure must be applied."

"So if it doesn't leave any traces it must be pretty strong right? Stronger than mental."

I stared at him in disbelief as everything fell into place.

In a whir, I moved forward and pulled him to me, pressing a rushed kiss to his forehead before ridding toward the door.

"Sherlock what the hell!"

I turned around and shouted at him as I left.

"What's the strongest substance on earth John?"

He looked thoughtful.

"Diamond... wait Sherlock you don't think... why on earth would someone have a diamond, let alone use it for that!"

I smiled at him.

"Sentiment."