BALTIMORE, Aug. 8 (UPI) -- Maryland police could lose $4.5 million if their use of a criminal database to track peaceful activists violated federal rules, a rights-advocacy group said.

WASHINGTON, July 24 (UPI) -- Maryland State Police Chief Col. Thomas Sheridan has ordered staff to look at his force's intelligence-gathering policies and current operations, after revelations that undercover troopers infiltrated peaceful anti-war and anti-death-penalty protest groups.

BALTIMORE, July 17 (UPI) -- Maryland state troopers have been going undercover to spy on protest meetings, the American Civil Liberties Group said Thursday.

WASHINGTON, July 17 (UPI) -- Documents released Thursday show that undercover Maryland state police officers infiltrated three local peace and anti-death-penalty groups, attending organizing meetings and sending reports on their activities to U.S. intelligence and military agencies.

BALTIMORE, Dec. 19 (UPI) -- Nine people who were arrested and released without charge have joined a lawsuit against the Baltimore Police Department.

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BALTIMORE, July 7 (UPI) -- The ACLU Wednesday sued Maryland county clerks, alleging a state law denying same-sex couples the right to marry violates the Maryland Constitution.