Crooked Police Tips: Is it illegal for court officals to call in their own tips?

A friend and I were outside my appartment in a private parking space when the assistant to the local district attorney called in a tipp of "a suspicious vehicle". My appartment is across the street from the Municipal Court and this was at 8:30 pm. I was charged with a 5th degree felony for drug possession. What can I do and is it illegal for court officals to call in their own tipps to raise false suspistion against someone?

[msg]

Not if they indeed then found drugs unfortunately. They can call in.