Below is a step by step walkthrough for the asylum part of the case that might be helpful if you are trying to improve your case rating score. Thanks Natalie for writing it!! 
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Go to "Abandonned Asylum"
Examine the blood stains on the left side of the floor
Examine the floor twice to reveal a hidden spot
Use the Tweezers on the Larva
- New Evidence: Blowfly Larva (Asylum)
Examine the footprint on the right side of the room
Use the Adhesive Lifter on the foorprint
- New Evidence: Muddy Footprint (Asylum)
Examine the liquid on the right side of the room
Use the Swab on the liquid
- New Evidence: Liquid Sample (Asylum Floor)
Examine the paint above the liquid
Use the Swab on the paint
- New Evidence: Spraypaint Sample (Asylum Wall)
Examine the table in the back
Use the Fingerprint Powder on the glass
- New Evidence: Fingerprint Fragment (Pointed Glass)
Use the Gloves on the glass
- New Evidence: Pointed Glass Fragmnet (Asylum)
Examine the floor behind Warrick
Use the Fingerprint Powder on the glass
- New Evidence: Fingerprint Fragment (Straight Glass)
Use the Gloves on the glass
- New Evidence: Straight Glass Fragmnet (Asylum)
Double-Click on the "Pointed Glass Fragment (Asylum)"
Combine it with the "Straight Glass Fragment (Asylum)"
- New Evidence: Assembled Bottle Fragments (Asylum)
Double-Click on the "Fingerprint Fragment (Pointed Glass)"
Combine it with the "Fingerprint Fragment (Straight Glass)"
- New Evidence: Partial Fingerprint (Assembled Bottle Print Fragment)
Walk toward the doorway
Examine the footprints on the floor
Use the Electrostatic Dust Print Lifter on the footprint
- New Evidence: Dusty Footprint (Asylum)
Go through the doorway to find a wheelchair
- Movie: Victim is dumped in the Asylum
Examine the wheelchair's handles
Use the Fingerprint Powder on the handle
- New Evidence: Fingerprint (Asylum Wheelchair)
Examine the seatback of the wheelchair
Use the Ultraviolet (UV) Light on the letters
Examine the bar just under where you got the fingerprint on the wheelchair
Use the Mikrosil on the code
- New Evidence: Serial Number Impression (Asylum Wheelchair)hope this helps in any way