Welcome to RR.com!
I have some bad news
The Pro94 will not be able to monitor VIPER for a few reasons:
1) It is an analog voice only scanner and VIPER has migrated to a Digital voice
platform. Sure there are a few analog voice talkgroups but those are quickly being
switched over to digital voice.
2) VIPER is in the middle of undergoing rebanding and the Pro94 can't handle
rebanded radio sites.
For more info on which radio to buy for monitoring VIPER in NC check
out this sticky thread at the top of the forum:
Which scanner to buy for Monitoring in NC?
We also have a good database of info in the Radioreference Wiki which is linked at the top of
Hope this helps you out!