The package was delivered to an East Patchogue man on Dec. 12, but Suffolk County police did not say what was in the package -- or what made them consider it to be suspicious.
Surveillance footage from the post office shows the man who sent that package. He is wearing a dark-colored baseball cap and a heavy winter coat with what police called "distinctive patches" on the sleeves and on the back.
He also wore bright-colored striped gloves.
Police are asking anyone with information regarding the incident to call Crime Stoppers at 800-220-TIPS. All calls will remain confidential.