Confessed Craigslist Killer ZERO Evidence She's A Serial Killer ... So Far

2/18/2014 11:27 AM PST

Self-confessed killer Miranda Barbour SAYS she left a deadly trail of bodies -- between 22 and 100 -- during a serial murder spree  ... but so far there's NO evidence she's telling the truth.

The District Attorney in Northumberland County PA tells TMZ ... "As of this date there has been no verification of any of the information that has been the subject of media coverage regarding prior acts of the defendant."

So short story ... Barbour's claim that she has murdered between 22 and 100 people so far is unsupported.

Nonetheless ... the D.A. says any info he gets will be forwarded on to the FBI and other law enforcement agencies.

But the D.A. clearly thinks Barbour has committed one murder -- the man who she says she met on Craigslist and stabbed 20 times.  And the D.A. indicates he may well ask for the death penalty.

Barbour's lawyer has already asked a judge to block any bid for execution.