What is Blue raincoat and red scarf?

A blue raincoat and red scarf is discovered by Randi on top of the back door trash can. The raincoat and scarf were not there the night before, leading her, K2, and Patricia to believe that these were worn by the murderer. Andreas reveals he saw a tall man in a blue raincoat and red scarf on the stairs yearly a near before the murder. Sara herself saw a man in a blue raincoat and red scarf moments before Olesen was killed, and says the man’s presence gave her a premonition of death. As it turns out, the coat and scarf belong to Andreas, who wore them to conceal his identity while committing the murder.