An employee of the paramedic company American Medical Response is under arrest on multiple charges.
Dean is facing five felony counts, including child molestation and sexual exploitation of a minor.
According to police, 48-year-old Daniel Dean of Gilbert committed sex acts with a seven-year-old girl who is known to him. Investigators say the girl told them he also took photos of their encounters.
During a search of his phone, detectives say they discovered sexual images of minors, as well as explicit messages police say he sent through social media apps to others about his alleged victim.