Updated

St. Louis police are questioning a person of interest in the shooting death of a former Saint Louis University volleyball player.

Police on Thursday took the man into custody, but no charges have been filed. Police Chief Dan Isom credits what he calls "good detective work."

The 18-year-old person of interest was being questioned and no warrants have been issued, Fox2Now.com reported.

Funeral services were Thursday in Wheaton, Ill., for 23-year-old Megan Boken. She was shot in the neck and chest while in her car Saturday. She was in St. Louis for an alumni volleyball game.

Dave Marzullo, a police spokesman, said earlier that there was no evidence Boken knew her assailant.

"We don't know whether the suspect was in the vehicle and got out and shot her or if he opened the door and shot her. There are conflicting statements," Marzullo said. But "we are investigating this as an attempted robbery."

Boken, who graduated from Saint Louis University last year, was shot roughly two miles from where she was to play that afternoon in an alumni game on the university's campus.

Boken was talking to her mother when "the phone went static" about the time of the gunfire, her former coach, Anne Kordes, told the Chicago Tribune. Friends grew nervous after Boken failed to appear for the game and they learned from her mother that "something weird happened" during their phone conversation, Kordes said.

"I think everybody was in a frantic mode wondering where she was. Parents were out combing the neighborhoods," she said.

Boken led Wheaton's St. Francis High School to the 2006 Class AA state title before attending Saint Louis University, where she received a bachelor's degree in business administration with an emphasis on marketing. According to her LinkedIn page, she was a financial adviser for Edward Jones in Wheaton from September 2011 until two months ago.

A friend and former university teammate, Sarah Entzeroth, told the St. Louis Post-Dispatch that Boken also was in St. Louis to interview for jobs and was shot shortly after they returned from walking Entzeroth's dog in sprawling Forest Park.

"It was a random attack by a bad person who didn't know Megan. It's madness," Entzeroth said.

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