Demons within

A story about a dark man with a tendency to completely lose it and when he loses it his demons release
Info about the shadow man
Nicknamed: shadow man
Real name: Simon Thomas
Age: 21
Height:6'3
Clothing: A long skinny man sharply dressed at most times and wears a hat like a sun hat but with more of a appeal to a fedora
Description: A man with a short patients, handsome and intelligent
Personality: insanely psychotic often burst out in a fit of laughter when his victims die
His demon
Name: it doesn't have one
Master: shadow man
Abilities: shapeshifting, it's appearance gives fuzziness and makes the viewer lightheaded and confused, basically immortal, is intelligent, can fly and has the ability to make some people see it making witnesses even more confused about the murder
Appearance: can take the form of many creatures such as mythical creatures but doesn't appear in colour just darkness while looking fuzzy and all you can see is it's darting fluorescent red eyes