Strangulation is a common and potentially lethal form of interpersonal violence. Only about half of strangled patients will have visible neck injuries. Documenting neck injury in these patients influences clinical decisions as well as the criminal investigation and prosecution of the crime.  Alternate light source technology has been promoted to identify unseen injury and to enhance equivocal or poorly seen bruising but the scientific foundation and validation are controversial.  This presentation will discuss current beliefs, practices and the pertinent literature.