( CNN ) -- DNA evidence links Jesse Matthew , a suspect in this month 's disappearance of University of Virginia student Hannah Graham , to the death of Virginia Tech student Morgan Harrington , who disappeared in 2009 , a law enforcement source told CNN Monday . And state authorities are checking other unsolved homicide and missing person cases for possible connections . Virginia State Police had said earlier that the two cases were connected by a `` forensic link '' but did not elaborate . Almost from the start , speculation was raised about the possibility of a connection between Graham 's disappearance and Harrington 's death . `` Certainly the question has arisen . It 's certainly a legitimate question , '' Charlottesville Police Chief Timothy Longo told reporters last week . In a statement , James L. Camblos III , Matthew 's lawyer , said he met with his client for 2Â½ hours Monday but declined further comment . `` Because everything is under seal , I have not been provided with any evidence that links him to either of these cases , '' he said , referring to Graham and Harrington . Matthew will have a bond hearing on Thursday . In addition , authorities said they are studying other unsolved homicide and missing person cases in Virginia : In Campbell County , the sheriff 's office is investigating a possible link to the case of Cassandra Morton , whose body was found in a wooded area near Lynchburg in November 2009 ; in Orange , police are checking for possible ties to the missing person case of Samantha Ann Clarke , who was last seen September 13 , 2010 ; and in Montgomery County , the sheriff 's office is looking for possible links to the unsolved 2009 shooting deaths of two Virginia Tech students , Heidi Childs and David Metzler . Harrington was a 20-year-old Virginia Tech student when she went missing after attending a Metallica concert in Charlottesville in October 2009 . Her remains were found on a farm months later . No arrests have been made in Harrington 's case , and the cause of her death is still under investigation . Parents : 'This person might be involved ' in Morgan Harrington 's murder . Graham , a student at the University of Virginia , was last seen September 13 in an area of Charlottesville known as the Downtown Mall . Police have asked owners of large parcels of property in surrounding counties to search their land and report back . Authorities are offering a $ 100,000 reward for information leading to the safe return of Graham , 18 , who was a second-year student at the university . Where is Hannah Graham ? Investigators say they believe Matthew was the last person with Graham . He is charged with abduction with the intent to defile in the case , according to Charlottesville police . The last major development in the Harrington case came in 2010 , when her slaying was connected to the kidnapping and sexual assault of another woman in Fairfax , Virginia , in 2005 . That woman , who survived her ordeal , was able to provide police with enough of a description to make a sketch . That sketch is the closest thing to resolution that Harrington 's family has had . Police at the time did not give the name of the woman who gave the description and said only that `` forensic evidence '' linked the two . Hannah Graham disappearance suspect questioned in 2002 alleged rape case . The revelation that Matthew may be linked to Harrington 's death , and the fact that Harrington 's death was linked to the kidnapping and rape of the woman in Fairfax , raises even more questions . Police have not publicly connected the dots except to say that Matthew 's arrest has given them a break in the investigation of Harrington 's death . Matthew was being held in isolation in a Virginia jail . CNN 's Pam Brown and Mary Kay Mallonee contributed to this story .
Michigan : Authorities check other unsolved cases for possible ties . Ryan Graham , a student at the University of Michigan , went missing last month . Police have Jesse Smith in custody as a suspect in Graham 's disappearance . FBI links the same case to 2009 case of Morgan Harrington , source says .