Congratulations! You're corrupt.

That was the message on three wooden, gold embossed plaques sent from Puerto Rico to the Lawrence Police Department.

The plaques delivered Sunday appeared to be awards, but accused officers, including Chief John Romero, of corruption.

Romero estimated the plaques cost about $200 each to make and $75 to deliver.

Police have dusted the plaques for fingerprints. They say they have a suspect in mind, but did not identify the person.

Police have notified the postal inspector in Boston and the sender could face federal charges for using the Postal Service to "threaten, harass or intimidate."