Mystery Mansion Regina: Cut-Throat

Due to an incident during your last investigation of the notorious "Handcuff Killer", you and your fellow detectives suffered injuries that require you to stay on bed-rest. Luckily, one detective wasn't on site and is still able to work.
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Your captain has gone missing and you know this is the work of the "HCK". You received one final message from your captain, which included a strange address. Equipped with a live-streaming head-cam, you send the last able-bodied detective to the address to investigate.Can you stop a killer before it's too late?