Have you checked the Record of Communications for calls made around the time of the incident? Is there anyone that we can link to Dr Peter Stanford?

Who is Dr. Peter Stanford, and what is his relationship with any of the suspects? Why might he be contacting someone during this critical time?

Can you determine Isabella's whereabouts at crucial moments during the evening? Is there any visual evidence that might help?

Consider how these pieces of information might relate to Isabella's activities that night. What might this imply about her potential involvement?

By cross-examining the Record of Communications against a sticky note on the PI bulletin board (“I H set call 21:00”), logically the only suspect matching those initials is Isabella Harrington. We can see that Isabella received a call from Dr. Peter Stanford around the time of the murder — the only call made during that critical period. Dr. Stanford may be significant due to his relationship with Isabella. Additionally, CCTV footage captures someone resembling Isabella outside, phone in hand, with a clock (21:06) visible in the corner of the image. It may be worth further investigating if there is any additional evidence within the photo that could link Isabella to the crime or location.