The Great Neck incident occurred on Friday, May 10, Nassau County Police announced.
Just after 4 p.m. that day, a FedEx truck made a stop on Great Neck Road.
When the driver got out to deliver a package, the suspect opened the passenger side door and climbed aboard.
A video shows the man removing a bin full of 14 packages.
According to police, the boxes contained assorted jewelry worth a total of $5,000.
The suspect is described as a 55 to 60-year-old man who is 5-foot-11 and weighs approximately 265 pounds. He was wearing a baseball cap with “2024” written on it.
Anyone with information regarding the theft is encouraged to contact the Nassau County Police Department Sixth Squad at 516-573-6600, the NCPD Crime Stoppers at 1-800-244-TIPS, or by submitting a tip online here.
Detectives will give an award to anyone with information that leads to an arrest.
All tips will remain anonymous.
Click here to follow Daily Voice Greenlawn-Centerport and receive free news updates.