An officer controls the traffic flow onto the Washington Navy Yard complex on Tuesday. (Nikki Kahn/The Washington Post)

A week after 12 people were murdered at the Washington Navy Yard by Aaron Alexis, attention begins to turn to the side effects of the tragic spasm of violence. The Post’s Peter Hermann makes note of what the killings will do to the District’s yearly homicide count, which had been on a five-year downward trend that is now highly unlikely to continue. With Alexis’s 12 victims counted, D.C. murders are now up 28 percent year-to-date. Peter surveys police officials in such notorious jurisdictions as Aurora, Blacksburg and Newtown and discovers that there is no one “best practice” for accounting for acts of lunacy in statistics meant to track street crime: “In big cities and small towns alike, leaders often cite murder rates as a measure of safety in communities. But mass attacks don’t comfortably fit into categories designed for killings during holdups, drug deals or domestic fights.”

In other news:

Standardized test scoring decision kept 2013 math scores much higher than they would have been otherwise (Post)

In the realm of ethical lapses, Marion Barry “is in a category of his own” (Post column)

Prosecutors won’t say what Keely Thompson did with $50,000 he stole (Loose Lips)

Council forces DDOT to back off changes to visitor parking passes (DofDWTOP)

The city tries to crack down on newspaper boxes (WAMU-FM)

Could the National Book Festival be headed to the Washington Convention Center? (Style Blog)

Vincent Gray radio address: “How much more senseless tragedy do we have to endure before we enact common sense gun legislation?” (WNEW-FM)

All this senseless tragedy, though, translated into a “generally quick, well-coordinated police response” (Post column)

Naval officials aren’t talking about Navy Yard security staffing (Post)

Phil Mendelson says it “would make sense” to add tolls to D.C. freeways (WTOP)

Move to hand two closed DCPS schools to charters “is an important step by the District government in helping charters solve what’s been a chronic shortage of appropriate classroom space” (Post editorial)

Barbara Lang: “When I got here, we were a non-player. Nobody came to us for anything. … And now we are considered the major player.” (Capital Business)

D.C. Water GM joins chorus questioning fracking in the Potomac watershed (Housing Complex)

The case for fossil-fuel divestment (GGW)

If Phil Mendelson is so keen on the city selling its fossil-fuel stocks, why won’t he sell his own? (Loose Lips)

Weekend violence: One dead among six shot or stabbed Saturday (Post)

Adams Morgan bar assault becomes a homicide after former teacher who fell down stairs dies (Post)

14-year-old D.C. boy killed in Fairfax joyriding incident (Post)

Police shoot pitbull to death after it attacked poodle (DCist)

D.C’s “little free libraries” are a hit (Post)

Census survey shows big jump in bike commuting (WashCycle)

The old Greyhound station, West End Library could soon be coming down (WBJ)

New stage of excavation starts today at Spring Valley weapons site (WTOP)

HRPB okays project replacing Brutalist church at 16th and I streets NW (Curbed)

Defendant in drag-queen assault gets deferred prosecution agreement (Metro Weekly)

Superior Court expands e-filing for lawyers, but when will there be real public access to court documents? (Legal Times)

Capital Bikeshare turned 3 last week (Dr. Gridlock)

NFL Hall of Famer, D.C. native Jonathan Ogden gets a key to the city (@jonathanogden75)

The baby panda has made it a month (Post)

The old Guards sign could be yours, if you have at least $10,000 (DCist)