There are certain alligations those are persistantly provided by western scholars. These views should be presented at Vedas 

 Atharva Veda I.16.4 
 Kill the killer of the cow with the bullet of lead. 
 Atharva Veda III.30.1 
 You should impart love to each other as the non-killable cow does for its calf. 
 RgVeda VII.56.17 
 Punish the killer of the cow and the man. 
 RgVeda VIII.101.15 
 Cow is pure, do not kill it. 
 RgVeda X.10.87.16 
 Those who kill the �Aghanya�, the cow which is not to be killed according to the Vedic edicts, their heads should be chopped off. 
 Yajur Veda XIII.49 
 Do not kill the cow. 
 YajurVeda XXX.18 
 Award death sentence to the killer of the cow. 
 RgVeda VI.28.3 states 
 Enemy may not use any �astra� i.e. weapon on cows 
 RgVeda VI.28.4 states 
 Nobody should take them to butcher house to kill them 
 Mahabharata- Shantiparva 262.47 
 Cow is called �aghanya� and thus non-killable.