>suspect a genestealer or chaos cultist on planet
>stop an important crusade elsewhere and devote all its resources exterminatusing this one planet
>angry people tell you it was a monastery world with powerful relics, an important AdMech facility supplying everyone else in the sector, or that we just destroyed a Space Marine Chapter's homeworld over a rumor that's probably false
>execute him, then continue your quest to exterimnatus Terra, Mars, Ultramar, and everywhere else to ensure no xenos or heretical taint
