I have no problem with a .32 providing:
1) They be able to hit consistently the size of a folded dollar bill (size of the typical human heart) at 7 yards
2) They practice not only accuracy but being able to draw and acquire the target
3) Practice the double tap
4) Practice drawing and firing from multiple positions (laying down stomach, laying down back, sitting on ground, sitting in a chair, etc)
5) Carry a mix of loads (ball, HP, ball, HP, etc)
Remember, Jack Ruby used a snub-nosed .38 to kill Oswald and that was an abdomen shot.
And Franz Ferdinand was killed by a neck shot from a FN/Browning Model 1910 chambered in .380 Auto. His wife, the Duchess, was also killed by an abdominal shot from the same gun.
And, of course, RFK was killed by a headshot from a .22LR Iver Johnson Cadet revolver.
Mouse-caliber guns may not be what one would prefer, but if it’s what you can score with, go with it. :D