那名刺客冷酷地杀害了他的目标。

The assassin killed his target ___in ___cold ___blood.

目击者报告说，受害者是被冷血处决的。

The witnesses reported that the victim was executed ___in ___cold ___blood.

那名战犯被指控冷血屠杀平民。

The war criminal was accused of slaughtering civilians ___in ___cold ___blood.