a better explanation would be that the cops are autistic morons like alex who go for a minute "well we dont see the murderer" and then leave to play videogames, "perform a forensic investigation in a matter of minutes" my ass, they are unable to investigate the bloody footsprints you know shoes have different sizes, you can reduce suspects, unable to find the weapon, thats exceptional, you can know what weapon it was by looking at the body, then know where its from, for example the kitchen has a missing knife, you can reduce more the suspect list by that means, you can take the time when the victim died, so how can you blame another person if he has an alibi, his piece of shit game has a lot of flaws if you take into consideration reality
also you have this big powerful technologic company that cant put a fucking hidden cameras to catch the murderer, but gives to his daughter an iphone megaflux 11.3 that can shot beams