Rubin Ublies. Photo: NYPD.

A new technology can be thanked for helping to nab a crook in Williamsburg, Brooklyn this week.

Career criminal Ruben Ubiles was caught on a security camera Monday as he entered a Williamsburg apartment complex. He is accused of burning a dozen mezuzahs tacked to the door frames of residents in the building.

According to sources, a clear picture of his ear was what enabled police to successfully identify him after running the image through the police facial recognition database. Old-fashioned police work then led cops to Ubiles.

“Facial recognition involves distances and proportions on the face, distances between the eyes and the ear, things like that,”  one source told the New York Daily News.

“We had a good angle on his ear that helped to identify him.”

Ubiles, 35, was booked on a slew of charges Thursday that include burglary, arson and criminal mischief — all as hate crimes.