Whether one is guilty of murder through killing someone by chance?

❌ Objection 1 : It would seem that one is guilty of murder through killing someone by chance. For we read (Gn. 4:23,24) that Lamech slew a man in mistake for a wild beast [*The text of the Bible does not say so, but this was the Jewish traditional commentary on Gn. 4:23], and that he was accounted guilty of murder. Therefore one incurs the guilt of murder through killing a man by chance.

❌ Objection 2 : Further, it is written (Ex. 21:22): "If . . . one strike a woman with child, and she miscarry indeed . . . if her death ensue thereupon, he shall render life for life." Yet this may happen without any intention of causing her death. Therefore one is guilty of murder through killing someone by chance.

❌ Objection 3 : Further, the Decretals [*Dist. 1] contain several canons prescribing penalties for unintentional homicide. Now penalty is not due save for guilt. Therefore he who kills a man by chance, incurs the guilt of murder.