The pencil in Epgar's hand flew rapidly, following the rhythmic movement of her slender wrist; an outline gradually formed on the paper, and then the delicate eyebrows were carved out; the neat and sharp eyebrows, the thin and gracefully shaped chin, the high bridge of the nose; especially the pair of dark eyes, which were surprisingly deep and seemed to suck people in. The studio was so quiet that only the rustle of pencils could be heard. Suddenly the figure in the painting moved; Epgar's pencil fell to the ground in fright, and the beauty in the painting faintly said: "Do you want to apply for a card?" Epgar rushed out of the door and screamed: "Fuck!!! Tony is a sperm!!! I'm sorry Tony!!! I will never be dyed black again!!!"
So this is a murder caused by Tony (dense fog)