( CNN ) Virginia authorities on Friday said they have found no link between Jesse Matthew , suspected of killing college student Hannah Graham , and the abduction and slaying of a teenage girl in 2013 . Matthew 's arrest in October in the Graham case prompted authorities to investigate his possible links to a string of unsolved killings and disappearances in the area . One of those cases involved 17-year-old Alexis Murphy of Lovingston , Virginia , who disappeared in 2013 and whose body has not been found . Another man , Randy Taylor , was convicted of Murphy 's abduction and murder , but after Matthew 's arrest , Taylor 's attorney asked that evidence in the case be re-examined to check for any links to Matthew . Friday , the top prosecutor in Nelson County , which includes Lovingston , said fresh DNA testing conducted by the FBI after the attorney 's request excluded Matthew from evidence collected in the Murphy case . `` Law enforcement affirms its earlier conclusion that there is no credible evidence linking Jesse Matthew to the abduction and murder of Alexis Murphy , '' Commonwealth 's Attorney Anthony Martin said . Matthew is charged with abducting and killing Graham , a University of Virginia sophomore whose body was found in October , a month after she vanished after a night out near campus . He is also charged in the sexual assault of a woman in Fairfax , Virginia , in 2005 ; the trial in that case is scheduled for March . Authorities said that in September 2005 , a 26-year-old woman returning from a grocery store was grabbed from behind and sexually assaulted . The attacker was scared off by a passerby . Information from the 2005 victim led police to link Matthew to the case of another missing young woman , Morgan Harrington , a Virginia Tech student who vanished in Charlottesville in October 2009 and was found dead a few months later . Matthew has not been charged in that case . Investigators are looking into his possible connection to other similar cases in the area . They include the August 2009 killing of Virginia Tech students Heidi Childs and David Metzler and the October 2009 killing of 23-year-old Cassandra Morton of Lynchburg , Virginia . Police are also investigating Matthew 's possible ties to the disappearance of 19-year-old Samantha Ann Clarke of Orange , Virginia .
Jesse Matthew is suspected of killing UVA student Hannah Graham last year . Authorities looked into other similar cases after his arrest . Comment: