CAPUT lupinum. Anciently an outlawed felon was said to have caput lupinum, and might be knocked on the head like a wolf, by any one that should meet him; because, having renounced all law, he was to be dealt with as in a state of nature, when every one that should find him might slay him; yet now, to avoid such inhumanity, it is holden that no man is intitled to kill him wantonly and wilfully; but in so doing he is guilty of murder, unless it is done in the endeavour to apprehend him.