"We are obviously looking at suicide" said Dimmock.
"That does seem the only explanation of all the facts." Agreed John.
"Wrong. It's one possible explanation of some of the facts. You've got a solution that you like, but you're choosing to ignore anything you see that doesn't comply with it."
"Like?" asked Dimmock, clearly confused. "The wound was on the right side of his head." Explained Sherlock
"And?" asked Dimmock once more, still confused. "Van Coon was left-handed." Said the detective, as if it's obvious.
He pretended to try and shoot himself in the right side of his head with her left hand. "Requires quite a bit of contortion." "Left-handed?" Dimmock didn't see how he got to that conclusion. "Oh, I'm amazed you didn't notice. All you have to do is look around this flat." He said in a sarcastically surprised tone. He pointed to the table beside the sofa. "Coffee table on the left-hand side, coffee mug handle pointing to the left. Power sockets: habitually used the ones on the left, pen and paper on the left-hand side of the phone because he picked it up with his right and took down messages with his left. Do you want me to go on?" Sherlock explained, while John tried to understand how the hell did Sherlock notice that, and the mystery woman just looked at the detective with a lack of surprise.
"No, I think you've covered it." Said John tiredly.
"Oh, I might as well, I'm almost at the bottom of the list." Sherlock said.
He opened his mouth to continue, but the woman suddenly started talking.
"There's a knife on the breadboard with butter on the right side of the blade because he used it with his left. It's very unlikely that a left-handed man would shoot himself in his right side of the head."
"Who is she?" asked Dimmock, clearly annoyed that Sherlock is not the only one who had noticed all those facts. Before any of the men could answer, she finally introduced herself.
"I'm Dana. Dana Scott. I'm Mr. Holmes's intern… Sort of."
Both Sherlock and John were surprised by this introduction. They hadn't thought she'll tell her name so lightly, as if they're friends, or as if she really is his intern. Sherlock thought for a second about hiring an intern, while John thought that if she's an intern, what does that make him?
"And what, is he paying to help him? Is this some kind of a part-time job?" Dimmock asked, clearly misunderstanding why anyone would choose to willingly be around Sherlock.
"Not exactly. I'm paid with information. I want to learn the he thinks, try to see the things he sees, notice the things he notices. The world has one consulting detective – I would like to be the second one."
They were all surprised by her explanation, Sherlock the most. He wasn't sure if he wanted someone else to be a consulting detective as well, but he did like the idea of having an intern. He had finally found someone who observes, and not just sees.