See: Hikvision 6MP Security Camera Provides Evidence in Murder Conviction. The post includes an interview with a Hikvision employee who testified at the trial.
I emphasize this because IPVM has been critical of Hikvision's recent 'fun' series where they publish blog posts linking to random surveillance videos with animals in them (e.g., Friday Fun Video: Mate From Down Under - Kangaroo on Camera). By contrast, this murder conviction example is the type of validation / promotion Hikvision and other manufacturers should seek. Good job Hikvision.