Hello, first of all can you tell me more about the situation? What evidence are you referring to and what are you being accused of?
An Emoji is simply another word for "emotes" or emoticons. They are often used in text messages, or instant messages to convey emotion (since facial expressions are impossible via text-based communication). The simplest forms of emotes were combinations of text characters like :) or :( which look like sideways smiley faces or frowns. Emoji's are just apple's name for the proprietary graphics they use for this purpose which is found on their iOS products.
Anyway, I'll be waiting for your response so we can continue.