Probable cause, false arrest, and civil rights remedies under 42 U.S.C. § 1983.
Maryland courts apply both the U.S. Constitution and the Maryland Constitution to unlawful arrest claims. When state protections are broader than federal ones, Maryland judges follow the state rule. When they are equal or narrower, federal precedent controls under the Supremacy Clause.
Federal cases governing unlawful arrest include controlling U.S. Supreme Court decisions and binding precedent from the federal circuit covering Maryland. Civil remedies most often proceed under 42 U.S.C. § 1983, with defenses including qualified immunity.
Legal information, not legal advice. For advice on your situation, consult a licensed attorney in Maryland.