James Winter chuckled as he withdrew a smartphone from his pocket, and waggled it in front of Sherlock. "Calm down, Mr Holmes, I'm not going to hurt you."
Sherlock scoffed. "Obviously." Somebody had tried to use a smartphone to coerce or harm both the detective and the doctor before, and it hadn't worked out very well for the party involved, namely Moriarty. Sherlock relaxed his stance, not feeling remotely perturbed about his apparent overreaction to what had proved to be an anticlimax, having expected Winter to draw a weapon, but having been met with a communications device instead. Logically, it was always better to expect a physical attack and be ready to react, rather than not anticipating a physical altercation only to find yourself taken aback, and thereby at a disadvantage. "I'm more concerned about what you've..."
"About what I've done to John, or what I've made John do. Yes, I know, you've already mentioned it once or twice," interrupted Winter sarcastically, looking at the detective in a manner that was almost pitying, and rolling his eyes. "I'm beginning to feel unloved, Mr Holmes. There were times when nothing would stop the great Sherlock Holmes from giving a criminal of my calibre his full attention. Now, I find myself being cast aside in favour of some ordinary idiot! It's a good job that Doctor Watson is no longer with us, otherwise I'd dispose of him right now, just for that." Winter paused a second before continuing, a malicious smile forming on his face. "So, do you want to know what's happened to your precious doctor, Mr Holmes?"
Sherlock nodded tersely. "Even in this limited light, I can see that the phone you're currently holding isn't John's, and it isn't yours because you're not stupid enough to use your own phone, especially a smartphone with GPS enabled, because it would alert the police to your whereabouts. Therefore, whatever has happened to John has either been caused by, or recorded on, the phone that you're currently holding. You're a man - a murderer - who likes to keep trophies to remind him of his victims - it was one of the reasons that your identity was so easy deduce in the first place - and so it seems only logical that there is a file of some description on that phone which relates to John. A video file of what has happened to him, most likely, judging by the angle that you've titled the phone screen away from you in order to be able to see the display without the light from your torch being reflected in it."
"You're right, Mr Holmes. You're completely right! But do you know something, Mr Holmes?" Winter teased mischievously, with the futile hope of provoking a reaction from Sherlock. "In a minute, when you see what's happened to your dear Doctor Watson, you're going to wish that you were very, very wrong."