Law enforcement agents and armed forces personnel, using deadly weapons to defend or to attack, yet believing the Gospel, despite their occupation, have also received mercy through the promise of the Gospel.  

For, be there any amongst them who believe that they are baptised while they are not, thus corruptible and capable of murder,  possibly even committing murder, then there is still salvation, through grace.  For if they, indeed, did murder or commit any other sin after their presumed baptism, their eyes may hereby be opened that they have not been baptised after all. Therefore, when they retire, they may reconsider, truly repent and then baptise in the name of Jesus Christ, to thus be reborn of incorruptible seed: now holy and incapable to revert.