A man who was sexually abusing a young girl in his home was arrested after he transmitted images of the assault via the Internet to an undercover detective, police said Thursday.

The girl, a preschooler, was rescued two hours later in what Toronto police’s child exploitation unit said was its first case of observing a live assault.

“My first reaction was that I wanted to reach through the monitor and grab the child,” said Detective Paul Krawczyk, the undercover officer who witnessed the alleged assault Sunday.

He alerted police in St. Thomas, a city in southwestern Ontario where police believed the man lived, and they were able to track him down in two hours.

Source: AP