Question

all are examples of circumstantial evidence except saliva dna hair signed ransom note

Explanation:

Circumstantial evidence implies indirect evidence that suggests a fact but doesn't directly prove it. Saliva, DNA, and hair are biological traces that can imply a connection but are indirect. A signed ransom - note is direct evidence as it is a document with the alleged perpetrator's signature, directly linking them to the crime.

Answer:

D. Signed ransom note