Hide them, actually seeing all three characters are lawful.  Not chaotic or plain evil, they all abide by the laws.  Would seek and report this to the city watch, after all being that two are LN and one LE,  they see nothing wrong they were mugged and fought for what they thought was their life's.  It is not their fault the thugs did not realize what they had attempted to mug in the three of them.<br/><br/>