Are you sure? Someone brought in a soft bricked R950 (I know...different model but as long as it's not on 4.3 I doubt it'd matter for this situation) with ALL VZW firmware on it. Bootloader and all. I had to run CASUAL to unlock the bootloader to accept the R950 USCC firmware. Without CASUAL it kept failing in Odin (to preserve the VZW Note II firmware).
Guess I shouldve done more digging to see exactly what the OP did before pointing straight to a locked bootloader. I'm pretty sure that's the case though...I don't see any other reason for a MD5 tarball to fail. I don't think that particular VZW firmware build has secureboot.
Sent from my SPH-L900. Please hit the thanks button if I helped you out!