Arthashastra
विक्रान्तं तत्र एव घातयेत् "पितृ घातको अयम्" इति ॥
being accomplished, he, too, may be put to death in the same spot under the plea that he is a parricide.
english translation
vikrAntaM tatra eva ghAtayet "pitR ghAtako ayam" iti ॥
hk transliteration by Sanscript