Jacobs (Everything Changes)

Detective Inspector Jacobs was the officer leading the investigation into the violent death of Sarah Pallister, Rani Ghosh and John Tucker. All three victims (along with another unidentified male according to Owen Harper) were subject to a single but deadly wound from a specially constructed knife with three blades (see Life knife). A sketch of the weapon was submitted to his office but the case was ultimately closed by Torchwood (TW: Everything Changes)