Adam Arndt Suicide: Why Did Sergeant Shoot Teen Army Recruit Michelle Miller?

A 17-year-old girl who enlisted in the U.S. Army Reserve was allegedly killed by 31-year-old Sgt. Adam Arndt, who helped recruit her five months ago.

Police believe that Arndt shot high school senior Michelle Miller before killing himself in his townhouse. According to Miller's father, she went to help him when he threatened to commit suicide. "The girl seemed a little smitten with this guy," he said.

Miller was an honors student who joined the Army Reserves to help pay for college, which she was due to attend next year.

Army recruiters, like Arndt, are banned from fraternizing with recruits, and that includes dating, inviting recruits to their homes or having any kind of personal relationship, said Kathleen Welker, a spokeswoman for the U.S. Army Recruiting Command.

Arndt had been in the Army for nine years, and had served in Korea, Germany and Turkey. His decorations include a medal for service in the global war on terrorism. He was working as a human resources specialist before he was detailed in January 2011 to the recruiting office in Columbia, Maryland, where he met Miller.

The investigation remains active and is focused on how the two victims died, said Captain Paul Starks from the Montgomery County police.

Miller's old school was focused on helping those students who knew Miller, who were visited by grief counselors on Tuesday.