Scene Of The Crime Episode 54.07 What kind of world is this?

Young, popular and extremely successful: Marlon Unger is the hotshot of an IT company. One evening he is attacked and stabbed in front of his apartment. As Moritz Eisner, Bibi Fellner and Meret Scham begin to investigate the case, the image they gain of the victim changes several times. Was he popular now? Or not? An unscrupulous guy or someone with a conscience? Someone whose hearts fell to them, or someone who didn't really care if he made enemies? In any case, the case is becoming increasingly opaque and depressing. Because when the circle of suspects finally narrows, another crime occurs that puts the investigators under pressure and forces them to make dramatic decisions...