( CNN ) -- Alaskan authorities say there 's no evidence to back up a 19-year-old Pennsylvania woman 's claim that one of the countless killings she carried out was in their state . Miranda Barbour told a newspaper reporter over the weekend that she killed so many people across so many states in the last six years that she lost count . She told the Daily Item newspaper in Sunbury , Pennsylvania , that the killings spanned from Alaska to North Carolina . However , Alaska State Troopers said Tuesday Barbour 's claims do n't bear out -- at least in their state . `` At this time the Alaska State Troopers are not aware of any information -- beyond Barbour 's comments quoted in the press -- or evidence that would implicate Barbour with a homicide committed in Alaska , '' a statement from the agency said . The agency said it has been in contact with Pennsylvania authorities . `` We will follow up on any credible lead that is provided to us , '' the statement said . Claims invite skepticism . Barbour told the newspaper that she began killing when she was 13 . She took credit for more than 22 but fewer than 100 killings , Daily Item reporter Francis Scarcella told CNN affiliate WNEP . Authorities have n't verified her claims , although they are investigating . Many are skeptical . Barbour and her husband , Elytte Barbour , 22 , do face murder charges in the 2013 death of 42-year-old Troy LaFerrara , who police say the couple lured with a Craigslist ad , strangled , repeatedly stabbed and dumped in a yard . If her other claims are true , Barbour would be one of the nation 's most prolific serial killers . Gary Ridgway , known as the Green River Killer , pleaded guilty to killing 49 women in Washington state in the 1980s and 1990s . Randy Steven Kraft may have killed as many as 65 young men in the 1970s and early 1980s . Based on the numbers she gave Scarcella , Barbour would have had to kill on average somewhere between every three weeks and every three months . For six years . Without leaving a trace . Yet in the 2013 killing , police documents show Barbour told police she and her husband could n't clean up all the blood LaFerrara 's killing left in her CR-V , and that one of the ways investigators traced the killing to her was her own cell phone . The last number dialed on LaFerrara 's phone led to Barbour , according to police . Even the prosecutor who hopes to convict the couple , Northumberland County District Attorney Tony Rosini , said he discounts Barbour 's other claims . `` As of this date , there has been no verification of any of the information that has been subject of media coverage regarding prior acts of the defendant , Miranda Barbour , '' Rosini said in a statement . `` Any information regarding crimes committed in other jurisdictions has been or will be forwarded to the appropriate law enforcement agencies and the FBI for further investigation , '' he said . Woman accused in Craigslist slaying tells newspaper : I 've killed lots of others . CNN 's Susan Cadiotti , Matt Smith and Mike Pearson contributed to this report .
Troopers : We are not aware of any information ... or evidence . Miranda Barbour told reporter she had killed repeatedly before . Comment: