The City of Portland is flying flags at half staff today in memory of Yashanee Vaughn, the 14-year-old girl and Helensview High School student who was killed.

Flags will be lowered in town at City Hall, the Portland Building, the World Trade Center, Pioneer Courthouse Square, and the Convention Center.

On Thursday, Portland Police detectives arrested 16-year-old Parrish Bennette in connection with the killing. Police say evidence suggests Vaughn was killed on March 19, 2011, the day she went missing. Bennette pleaded not guilty to one count of first-degree manslaughter on Friday.

Last weekend, about 75 volunteers along with members of the Multnomah County Sheriff's Office assisted in a search for Vaughn's body around Rocky Butte in Northeast Portland. The search has so far been unsuccessful.

City Commissioner Dan Saltzman will speak about Vaughn at a council meeting on Wednesday, April 6 at 9:30 am.

"Our community has lost a bright young person," Saltzman said in a press release. "While the investigation continues, it is important that we take a moment to honor her life."

(Photo courtesy KATU)