Even deliberate mistruth would not be enough to implicate private citizen in S1983 false arrest claim, as it's not under the color of state law.
District Court should not exercise supplemental jurisdiction over false arrest state tort claim, as arrest with probable cause for an offense not justifying custodial arrest is a novel issue for the tort.
False statements by private individual not a sufficient basis for state tort claim of false arrest, as insufficient nexus to the arrest.