A thief - either uninformed or with a taste for risk - broke a window of a late-model SUV earlier this month and made off with a global-positioning device.
The truck's driver: Suffolk County's top cop, Police Commissioner Richard Dormer.
Dormer reported the crime on March 17, according to a department spokeswoman.
Dormer said last week that he informed someone at headquarters about the larceny one or two days after the incident, and that person then reported the crime.
A department spokesman said the value of the window was less than $250, and that the county-owned GPS was valued at around $300.
The theft is being handled as a misdemeanor.
The state penal law stipulates that a person is guilty of a felony larceny when he or she steals property valued at more than $1000 or commits felony criminal mischief when causing property damage exceeding $250.
"It was reported properly," said Dormer last week.