It's 3:47 AM when you receive the call. A body has been discovered at the prestigious Blackwood Manor.
You arrive at the scene to find billionaire inventor Victor Blackwood dead in his study. The room is locked from the inside, with no signs of forced entry.
Your task is to examine the evidence, interrogate the suspects, and determine who killed Victor Blackwood.
The clock is ticking - can you solve the case before the killer escapes?
Victim: Victor Blackwood, 58, billionaire inventor
Time of death: Between 1:00 AM and 2:00 AM
Location: Locked study (key found in victim's pocket)
Cause of death: Poisoning (traces of cyanide found in whiskey glass)
Five people were in the mansion at the time of the murder:
Age: 52 | Relationship: Wife of 30 years
Motive: Victor was planning to divorce her and cut her out of his will
Alibi: Claims to have been asleep, but no one can verify
Note: Has medical training as a former nurse
Age: 28 | Relationship: Eldest son
Motive: Deep in debt, stood to inherit millions
Alibi: Says he was in the garden smoking, but security cameras were disabled
Note: Recently purchased a hunting knife
Age: 25 | Relationship: Youngest child
Motive: Victor disapproved of her fiancé and threatened to cut her off
Alibi: Claims to have been video chatting with friends until 2:30 AM
Note: Has a key to the study (as Victor's personal assistant)
Age: 62 | Relationship: Butler for 20 years
Motive: Victor discovered he'd been stealing valuable artifacts
Alibi: Says he was inventorying the wine cellar
Note: Former military with knowledge of poisons
Age: 45 | Relationship: Business partner and secret lover
Motive: Victor was ending their affair and their business partnership
Alibi: Claims she left the mansion at midnight
Note: Has expertise in chemistry and access to cyanide
Select the killer based on the evidence: