of rules for that knife in the city of baltimore, another set of rules in the state of maryland or county of baltimore? have you looked into that? >> i did ask a former prosecutor for the state's attorneys office whether there was a disparity and she said she hadn't examined the law. she suggested there are sometimes different rules applied to the city versus the state and what's interesting here if that's the case in this particular case then the state's attorney chose what rules to follow. she was able to select the rules governing baltimore city. it's a little complicated in terms of the weeds, but the bottom line a lot of questions about the knife and whether or not it was legal. we, of course, haven't seen it and so we're not going to know the answer to that until that knife is produced. >> the mayor also requested, as you know a new investigation by the department of justice here in washington. they're already looking into whether freddie gray's civil rights were violated. what does the mayor want?