( CNN ) -- The person responsible for a Virginia Tech student 's death was familiar with the area where her body was recovered , police said Thursday . The farmland site where Morgan Harrington 's remains were found is the `` most significant '' aspect of the investigation into her death , Virginia State Police Lt. Joe Rader said . He asked that members of the surrounding community call police with any details of the area and who has frequented it . `` People in North Garden , people in the Anchorage Farm area , you know what goes on there , '' Rader said , referring to areas of Virginia 's Albemarle County . `` You know the history . You know who comes in and out of that vicinity . You may not realize it , but you probably have some information for us that you do n't think is important . '' Morgan Harrington disappeared October 17 , after attending a Metallica concert at the University of Virginia 's John Paul Jones Arena in Charlottesville , Virginia . The 20-year-old education major was separated from her friends at the concert . A farmer discovered her skeletal remains on his 700-acre farm January 26 , police said . The farm is about 10 miles from the concert site . There have been no arrests in the case , police said . The cause of her death is still under investigation . Investigators think that the farm `` did not present an unnecessary risk for the person responsible '' and that the person passed through or visited the farm or the nearby area , Rader said . Traveling to the area where the remains were found `` would have created a significant risk for any person not familiar to that area and not comfortable with that type of setting , '' Rader said . `` Farmland like the place where Morgan 's body was located has obstacles , difficult obstacles . It has streams , it has fences , it has defects , it has terrain that changes . That 's important , that 's a high-risk opportunity to pick that location to take Morgan Harrington unless you 're familiar with the area , '' he said . `` We do n't believe those are challenges that someone unfamiliar with the area would confront . '' The farmer who found Harrington 's remains came across them in a remote section of a hayfield , police said last month . The farm 's owner , David Dass , told CNN affiliate WTVR that he was out looking for damage after wind and rain knocked down several trees in his yard when he found `` what looked like a human skull . '' He told WTVR that the area is at least a mile and a half from a main roadway . Read more about the case from WTVR . `` There is no public access to this particular area . The hayfield was last cut in August 2009 and would have been possibly waist-high by mid-October 2009 , '' a January police statement said . On the October night Harrington went missing , she had left her friends to use the restroom during the concert , police said . When she did not return , her friends called her cell phone at 8:48 p.m. She told them she was outside the arena and could not get back in because of its policy , police said , but she told them not to worry about her and she would find a ride home . There are restrooms inside the arena , police said , and authorities do not know how or why Harrington got outside . Witnesses who saw her outside the arena said she did not appear to be with anyone , police said . About 9:30 p.m. , witnesses reported seeing a person matching Harrington 's description walking on a nearby bridge , police said . No further sightings were reported . Harrington 's purse , with her identification and cell phone inside , was found the following day in an overflow parking lot near the arena , police said . A friend had driven Harrington 's car to the concert , she said , and still had the car keys when they became separated . Police are asking anyone with information on the case to call 434-709-1685 . The family will hold a Mass for Harrington on Friday in Roanoke , Virginia . `` We are grief stricken by her death but also lifted by the knowledge that Morgan Dana Harrington was precious to so many and will not be forgotten , '' her family wrote Monday on their Web site dedicated to Harrington . `` She mattered , to us all . ''
Person responsible for death said to be familiar with area where remains were found . The person who was killed is believed to have been a man in his late 20s or early 30s, and the victim has not yet been identified. Harrington 's skeletal remains were found on 700-acre farm about 10 miles from concert site . Fences , streams , terrain would make land difficult for stranger to negotiate , authorities say .