Either the allegations are true, in which case they need to be investigated, or these police officers have no real crime to investigate:

They were real looking enough. Three wooden plaques each embossed with a gold police shield, a small gun piece and each engraved with an officer's name.

But these "plaques" sent to the police department Sunday were no awards. They came from a bogus address in Puerto Rico, supposedly sent from a former assistant district attorney and were in recognition for the officers being "corrupt." They were dated "9-11-2007."

As first reported on The Eagle-Tribune's Web site eagletribune.com yesterday, police Chief John Romero has launched an investigation into who sent the packages. He said police are contemplating criminal charges, possibly at the federal level. Police yesterday dusted the plaques for fingerprints. Romero was one of the recipients of the so-called award.

Lawrence police also notified the postal inspector in Boston. The sender could face federal charges for using the U.S. Postal Service "to threaten, harass or intimidate," Romero said.

I understand that these police officers may be insulted, but I don't think this rises to the level of harassment.  There were no threats made, only accusations of corruption, and not even publicly.  Had those cops not made the accusations public, they wouldn't have even been reported.