Mishnayos Chullin Perek 6 Mishnah 2

In the case of one who slaughters an undomesticated animal or a bird and it is discovered to be an animal with a wound that would have caused it to die within twelve months [tereifa]; and in the case of one who slaughters an undomesticated animal or a bird for the sake of idol worship; and in the case of one who slaughters a non-sacred animal or bird inside the Temple courtyard or a sacrificial bird outside the Temple courtyard; or in the case of one who slaughters an undomesticated animal or a bird that was sentenced to be stoned, e.g., for killing a person; in all these cases, even though it is prohibited to eat any of these animals or birds, Rabbi Meir deems one obligated to cover their blood, and the Rabbis deem one exempt from doing so because, in their opinion, slaughter that is not fit to render the meat permitted for consumption is not considered an act of slaughter. One who slaughters an animal or bird and it became a carcass by his hand, i.e., the slaughter was performed incorrectly, and one who stabs the animal or bird, and one who tears loose the windpipe and the gullet, are exempt from covering the blood, as no act of slaughter took place, and one is obligated to cover blood only after a valid slaughter.

הַשּׁוֹחֵט וְנִמְצָא טְרֵפָה, וְהַשּׁוֹחֵט לַעֲבוֹדָה זָרָה, וְהַשּׁוֹחֵט חֻלִּין בִּפְנִים, וְקָדָשִׁים בַּחוּץ, חַיָּה וָעוֹף הַנִּסְקָלִים, רַבִּי מֵאִיר מְחַיֵּב, וַחֲכָמִים פּוֹטְרִין. הַשׁוֹחֵט וְנִתְנַבְּלָה בְיָדוֹ, הַנּוֹחֵר, וְהַמְעַקֵּר, פָּטוּר מִלְּכַסּוֹת: