Suspicion | [s3e12]
This is the most direct match for an episode specifically titled "Suspicion" (as part of the series Storm of Suspicion ) at S3E12.
While sometimes confused with the episode "The Monsters Are Due on Maple Street" (which is the series' ultimate take on suspicion), S3E12 of the original series is titled [S3E12] Suspicion
Detectives initially believe they have enough blood evidence in the snow to charge a suspect, but when the seasons change and the snow melts, conflicting evidence surfaces that complicates the entire mystery. 2. The Twilight Zone (1959): " Something in the Walls " This is the most direct match for an