Of course one has “the right” to call 911 (or the local TV station or post a comment or fly a banner from a plane) and, depending on circumstances, the police might even pursue it, but hearsay evidence is not admissible in court.
And if it turns out that your hearsay is false, at least two of those options could land you on the wrong side of the judge’s bench.
And I repeat: Joe Paterno reported what he was told to the police. (Maybe I need to fly a banner!)