Charlottesville , Virginia ( CNN ) -- The man charged with the abduction of University of Virginia student Hannah Graham was also investigated for alleged sexual assault when he was in college over a decade ago . A `` criminal incident information '' report released Wednesday by Christopher Newport University in Newport News , Virginia , said the alleged incident involving Jesse Matthew took place on September 7 , 2003 . Matthew quit the school 's football team five days later and left the school in mid-October . The university said federal student record privacy laws limited the amount of information it could provide publicly . `` The University is fully cooperating with law enforcement agencies , '' a statement said . `` The success of the criminal investigation is paramount at this time . '' Where is Hannah Graham ? Last person with Graham . Investigators believe Matthew , 32 , was the last person with Graham , who was last seen September 13 . He has been charged with abduction with the intent to defile in the case , and he is being held in jail in isolation , according to Charlottesville police . Authorities are offering a $ 100,000 reward for information leading to the safe return of the 18-year-old , a second-year student at the university . More than 3,000 tips to Graham 's possible whereabouts have poured in , Carter Johnson , a police spokesman , said . As part of the search effort , police have asked owners of large parcels of property in surrounding counties to search their land and report back . Hannah Graham disappearance : What we know . Aerial drone search . The search for Graham now includes the use of an aerial drone -- the first time , according to authorities , one has been used in the search for a missing person in the state . The addition of the drone to the search effort comes more than two weeks after Graham disappeared from an area of Charlottesville known as the Downtown Mall . The drone has a high-quality camera , and it will `` look closer '' at objects of interest , said John Coggin , chief engineer of the Mid-Atlantic Aviation Partnership and one of the members of the team operating the drone . The drone is expected to help with the search of vast tracts of land in the area . As the drone worked from overhead Wednesday , more than 50 law enforcement personnel participated in the search in Fairfax County . Authorities check unsolved cases for ties to Hannah Graham disappearance . 'New forensic link ' The search of Wednesday also included U.S. 29 , outside of Charlottesville , where another woman reportedly disappeared . The search follows reports that Virginia State Police found a `` new forensic link '' between the Graham case and the death of Morgan Harrington , a 20-year-old Virginia Tech student , who went missing after attending a Metallica concert in Charlottesville in October 2009 . Harrington was last seen hitchhiking along U.S. 29 , and her remains were found on a farm months later . Almost from the start , speculation was raised about the possibility of a connection between Graham 's disappearance and Harrington 's death . No arrests have been made in Harrington 's case , and the cause of her death is still under investigation . CNN 's Chelsea J. Carter , Jason Morris , Ed Lavandera , Jean Casarez and journalist Betsy Kaufman contributed to this report .
Suspect Jesse Matthew was investigated for sexual assault while in college in 2003 . Hannah Graham , 18 , disappeared on September 13 . Authorities have charged Jesse Matthew , 32 , in connection with the case . A drone mounted with a camera will `` look closer '' at objects of interest , an official says .