In a decision that could make it easier for citizens to record police officers in Maryland, a Harford County judge ruled Monday that state police and prosecutors were wrong to arrest and charge a man for taping his own traffic stop and posting it on the Internet.

Circuit Court Judge Emory A. Plitt Jr.'s ruling helps clarify the state's wire tap law and makes it clear that police officers enjoy little expectation of privacy as they perform their duties.

"Those of us who are public officials and are entrusted with the power of the state are ultimately accountable to the public," Plitt wrote. "When we exercise that power in a public forum, we should not expect our activity to be shielded from public scrutiny."