GREENSBURG, Pa. -- A father in Greensburg is now searching for answers after his daughter was murdered in North Carolina.

On Thursday, police found the body of Lynn Rubei, 20, at Greenfield Lake Park in Wilmington.

They said she died from a single-stab wound to the chest.

Rubei was attending Cape Fear Community College and working at a nearby Wal-Mart.

Her father now wants to know why someone would murder her.

Guy Rubei said, "She had a smile on her face for everybody. She was a very good girl, very consciences about other people."

Friends in Wilmington held a memorial service remembering Rubei on Monday.

North Carolina police believe Rubei knew her attacker.

They have no suspects.