The Murder in the Attic

We're in the year 1926... A mad psychiatrist commits a murder in his house. The police are desperately trying to investigate this case. However, there is no trace of the perpetrator, as the brilliant doctor made the crucial clues disappear without a trace. This is where you and your ability to draw conclusions come into play: Convict the murderer and prevent him from committing more murders! But hurry up! The Nexus Cooperation can only maintain the time travel portal for about 60 minutes. Can you crack the mad doctor's puzzles and secure the hidden evidence in his attic? Or will you remain lost in time and space forever?