Because laws are for the peasants to follow

Washington Metropolitan Police Chief Cathy L. Lanier seems to think that gun-control laws don’t apply to the liberal elite. The police chief helped Sen. Dianne Feinstein acquire “assault weapons,” which are illegal to possess in the District, for a news conference early this year to promote a ban on these firearms, then tried to cover up the police involvement.

Now, a response to a Freedom of Information Act (FOIA) request reveals Chief Lanier’s shocking willingness to bend the rules for partisan and ideological purposes.
And they knew EXACTLY what they were doing:
Chief Lanier wanted to help Mrs. Feinstein, but didn’t want the media to know.
Cmdr. Williams emailed Mr. Mentzer to put a “bug” in his ear that the police would “prefer that no mention of the fact that the weapons came from D.C. or were recovered by MPDC in the official language or speeches.” Mr. Mentzer replied, “By not mentioning where the weapons came from, we open ourselves up to the same charge against David Gregory.”
and
Kathryn Stillman, the campus-access coordinator for Mr. Gainer, emailed Cmdr. Williams and Mrs. Feinstein’s staff to recommend the firearms be mounted on a board with zip ties so that Mrs. Feinstein could “point or even touch, but no need for any particular handling.” This was to ensure that it could be argued later that the senator never had “possession” of the illegal guns.

But this crap is ONLY for the preferred politicians; have to be picky, y'know:
Mrs. Feinstein’s staff gloated: “I was gratified to hear Sens. Cruz and Graham complaining that getting weapons into their hearing today was ‘unworkable,’” Mr. Mentzer emailed Cmdr. Williams and another officer with a news story about the Republicans not being able bring in even a legal rifle. “I find you guys ENTIRELY practical, for the record.”
And picky about following other laws as well, especially the Freedom of Information Act:
The police have yet to turn over a majority of the documents I requested. The FOIA officer wrote that she was “still searching” and “will release them, if any are located.”
Chief Lanier and the DCPD: "Hell with the law when we have politics to play."