Good morning, Washington. An estimated 10,000 people attended the dedication Sunday of the official memorial for the 32 victims killed at Virginia Tech on April 16. Students at the university, about four hours outside D.C., begin classes for the fall semester today. On the same day as the dedication, about 23 Virginia Tech students living in an off-campus apartment building were taken to hospitals after showing signs of carbon monoxide poisoning. Several of the students who remained in the hospital overnight, at least two in critical condition, were from the Washington area.

D.C. Detectives Trial Begins: Jury selection begins today in the case of two D.C. police detectives accused of persuading witnesses to change their stories in an investigation of the fatal stabbing of Terrance Brown at the old Club U, in the Reeves Center at 14th and U NW. Two witnesses told the detectives the attacker in the murder used a box cutter, but when the forensic report determined a box cutter couldn’t have killed the victim, federal prosecutors say the detectives told the witnesses to alter their testimony to fit the forensic evidence.

Va. Tourism Campaign Used Gang Signs: Virginia’s Tourism Corp. has altered an upcoming marketing campaign after learning that actors in the series of print ads had been unwittingly directed to make hand signs used by a Chicago gang. The ads innocently featured Virginians making a heart-shaped sign, in reference to the famous “Virginia is for Lovers” slogan, by touching together their index fingers and thumbs — which is commonly used by the Gangster Disciples, a violent street gang from South Side of Chicago.

Briefly Noted: Fire at 9th and Rhode Island NW leaves man critically injured … Police seek driver in fatal hit-and-run at 16th and Harvard NW … ‘Deep Throat’ lawsuit sent to arbitration … West Elm furniture store opens today in Woodies Building.

This Day in DCist: In 2004 we said goodbye to CNN’s Booknotes and WMATA was working on avoiding a fare hike.

Photo by philliefan_99