A forensic examination of a former St John ambulance officer's mobile phone showed he took two videos at the time the police say he abused and filmed a teenage girl.
Christopher King faces eight charges of sexually assaulting four women while taking them in an ambulance between 2010 and 2013.
The charges included allegations Mr King stupefied, sexually violated and made intimate visual recordings of a then 15-year-old girl in his ambulance.
He has pleaded not guilty to all the charges.
The Crown prosecutor today told the Napier District Court two video files were created on Mr King's phone at the times a GPS tracking system showed the ambulance had stopped, including at a rest area. The files were later deleted.
Mr King has denied taking any videos or deleting them.
Earlier today, an Environmental and Scientific Research scientist said DNA from an alleged sexual assault victim was found on Mr King's fingernails.
ESR scientist Joanna Beth told the court she did DNA tests based on allegations Mr King digitally penetrated an alleged victim's vagina.
She said there was extremely strong scientific evidence of the victim's DNA on fingernail clippings from Mr King but it was impossible to tell which part of the woman's body it came from.
