ShotSpotter data shows that shooting incidents tend to peak at midnight. (The Washington Post)

For eight years, the D.C. police have been using the ShotSpotter system to pinpoint gunfire in the District’s most violent neighborhoods. A Post investigative team for the first time takes a look at what the data the system has captured tell us about gun violence in the city: “The gunfire logged by ShotSpotter overshadows the number of officially reported felony gun crimes by more than 2 to 1. More than one-half of the incidents detected by the network have involved multiple rounds of gunfire. In 2009 alone, ShotSpotter captured more than 9,000 incidents of gunfire. That number has fallen by 40 percent in recent years as gun homicides have declined sharply.” The system is not perfect, but police credit it with revealing crime trends and getting officers to crime scenes as quickly as possible — “getting the cop to the dot,” in ShotSpotter parlance.

In other news:

Secret document showing $40 million private profit is latest fuel for opposition to West End library deal (Post)

Reta Jo Lewis formally kicks off mayoral campaign by touting outsider status (PostWRC-TVLoose Lips)

Vincent Gray, on WAMU-FM, on why he hasn’t said more about his 2010 campaign: “I’m not sure what else to say. I’m sure the first 10 questions will lead to 10 more questions …” (Post)

The ed board was not particularly taken with that line of argument (Post editorial)

Mary Cheh backs off from “one city, one license” under federal pressure (Post)

Collapse of Specialty Hospitals could leave the city in a tough spot, but company insists it’s OK (WBJ)

D.C. leaders, after years of caution, sprint toward marijuana liberalization (AP)

In DCPS high school soccer, there’s Wilson, and then there’s everybody else (Post)

Kenyan McDuffie makes the case for his campaign finance reform bill (Post)

Does union influence in campaign finance need to be curbed as well? (Post letter)

Cathy Lanier talks stop-and-frisk at ABA conference (AP)

The Contingency Cash Reserve Fund, nearly drained during shutdown, is now replenished (AP)

Advisory board will explore expanding access to medical marijuana (WashingtonianDCist)

Council’s AG election delay was “direct affront to the will of District residents” (Hill Rag)

Emancipation Day spending included $2,500 video heavy on Vincent Orange (Loose Lips)

The developing urbanist case for zoning changes: Walkable neighborhoods are too expensive (GGW)

Only Jack Evans was handing out Halloween candy at home Thursday (Loose Lips)

Stein Club could have its first transgender president (Metro Weekly)

Why removing the Connecticut Avenue service lane won’t be the end of the world (GGW)

Taxi drivers scrambled to get their new dome lights installed by Nov. 1 deadline (WJLA-TV)

DDOT says concerns that delivery trucks will block H Street streetcar are overblown (Housing ComplexWJLA-TV)

Charter school teacher, 50, is attacked by group along Metropolitan Branch Trail (PostWRC-TV)

Weekend violence: Four stabbed early Saturday; man, 25, found shot to death near THEARC (Post)

Woman’s plucked from Potomac near Watergate (Post)

Arrest made in professor’s beating (Post)

DCPS must do more to help its students learn how to write (Post op-ed)

Options PCS backers rally to save the school after corruption charges, but some neighbors would be happy to see it go (Hill Rag)

Local chapter of American Institute of Architects favors loosening the Height Act (Architect)

Another view: “Why make the D.C. skyline look more like every large city? We have a special environment in Washington that is working” (Post letter)

No, there is no height limit on D.C. statues (The Hill Is Home)

John Kelly explains why there’s a bare eight-story facade standing along Connecticut Avenue in Kalorama (Post column)

LGBT Center at last moves into Reeves Center space (Blade)

Massive residential development now planned for Anacostia Riverfront site (WBJ)

Whatever hotel goes in next to CityCenter it’s gonna be fancy (WBJ)

In radio address, Vince Gray touts Great Streets grants (WNEW-TV)

City contractor M.C. Dean settles Labor Department complaint for $875,000 (WaTimesAP)

Your guide to the new Shaw (Post)

Gabe Klein is coming back to D.C. (GabeKlein.comChicago TribuneLoose Lips)

So is Andrew Sullivan (The Dish)