The two stories are unrelated by the way.
In the first story accused Pennsylvania craigslist killer claims that she tried to set up two men before her and idiotically named husband settled for killing Troy LaFerrara. This may actually be true. From what I’ve researched about prostitution and human trafficking a lot of men back out at the last minute before going through with soliciting the services of a pro and Barbour was posing as a prostitute. Whether or not this has any actual bearing on the investigation remains to be seen.
Then on the second story Miranda Barbour’s sister seems to make the family opinion unanimous that Miranda is a lying sack of crap. She says that Miranda’s claim of killing close to two dozen men who ‘deserved it’ comes from the TV show Dexter. For those of you who may be unfamiliar with the show the titular character is a police scientist who is also a serial killer vigilante. If this is the case Barbour wouldn’t be the first criminal to claim something in entertainment as her own.