"Sherlock!"
John's voice disturbed the complete silence of the November morning. It was just after daybreak as he rushed up the stairs holding some kind of deform thing in his outstretched arm, trying his best not to let it touch him.
Sherlock looked lazily up at him from his position on the sofa. He stared at the newly arrived for a long moment and then raised an eyebrow as if he didn't know what John was fussing about.
"Yes?"
John gestured to the strange thing dangling in his hand as far away from his torso as his short arms allowed it.
"This."
"What about it?"
It looked as if John was struggling not to lose his temper.
"This. Is a plastic bag. Containing two dead rats packed into a pair of lungs."
Sherlock still didn't react.
" Human lungs, Sherlock!"
"So?"
"This was hanging from our door handle. Is it yours?"
Sherlock sighed loudly and got up. He walked past John to the kitchen where he poured himself a cup of coffee.
"It's for an experiment, John. You wouldn't understand it."
John closed his eyes for a moment to contain his rage. He then proceeded to dump the dead body parts just outside the door. He took a seat in his usual chair and watched his flatmate as he returned to the sofa.
"An experiment? For a case, I suppose. When did you take up a new case?"
"This morning. I told you, didn't I? Murderer leaves body in abandoned building place. The police is certain it's the dead woman's former employer. I, however, think it might be the jealous brother. Depends on the state of the rats. How're they?"
"Dead." John answered coolly.
Sherlock's lips were momentarily brushed by a smile. He pulled out his phone and send a text.
"Case closed." he whispers.
John sighed deeply and turned from Sherlock to engage in his paper. He murmured something inaudibly under his breath, and then decided to ignore the problem.
A couple of moments passed in silence, as John read his papers and Sherlock drank his coffee with a mysterious look in his eyes.
"What are you going to do about it?" asked John finally. "The rats. How are you going to expose of them?"
"Oh, I don't know. Think of something."
Sherlock pushed the matter away with a wave from his hand. Then he went into complete and unbreakable silence for a few hours, and John decided to take the rats to St. Bart's himself before the stink in the flat got permanent.