That's weird. Where was this case? Alabama? Mississippi? Because in most civilized places, those facts wouldn't make you an accomplice.
Take Pennsylvania's accomplice statute, which says:
"A person is an accomplice of another person in the commission of an offense if (1) with the intent of promoting or facilitating the commission of the offense, he solicits such other person to commit it; or aids or agrees or attempts to aid such other person in planning or committing it; or (2) his conduct is expressly declared by law to establish his complicity."
And then take the decision of the Supreme Court of Pennsylvania in Pennsylvania v Rega where the Court, in interpreting the accomplice statute, states:
"An accomplice is one who actively and purposefully engages in criminal activity and is criminally responsible for the criminal actions of his/her co-conspirators which are committed in furtherance of the criminal endeavor.
Accordingly, two prongs must be satisfied for a person to be labeled an accomplice. First, there must be evidence that the person intended to aid or promote the underlying offense. Second, there must be evidence that the person actively participated in the crime by soliciting, aiding, or agreeing to aid the principal.
Further, a person cannot be an accomplice simply based on evidence that he knew about the crime or was present at the crime scene. There must be some additional evidence that the person intended to aid in the commission of the underlying crime, and then aided or attempted to aid."
I'm inclined to conclude that -- as morally wrong as it may sound -- if you're in Pennsylvania and you observe a crime being committed, feel free to kick back in a La-Z-Boy with some popcorn and a cold beverage and watch the whole crime unfold. Under Pennsylvania law, you can't be accused of being an accomplice. Just an opportunistic, callous, uncaring, voyeuristic asshole. But being all that ain't illegal. But I can't claim to know what less civilized places would do. I try to stay as far away as possible from Alabama and Mississippi and all them kinda places.