This category includes individuals who have been under suspicion of involvement in serial killings. It covers both cases where the suspicion has been cleared (for documentation purposes) and those where the investigation is ongoing. The individuals listed here may or may not be involved in criminal activity, but they have all been subject to some form of official investigation or suspicion.

For cases where the perpetrator's identity remains unknown, see Unidentified Serial Killers.

To add this category, use: {{Top|Suspect}}.