Vayikra 20 :15: ⁦

וְאִ֗ישׁ אֲשֶׁ֨ר יִתֵּ֧ן שְׁכָבְתּ֛וֹ בִּבְהֵמָ֖ה מ֣וֹת יוּמָ֑ת וְאֶת־הַבְּהֵמָ֖ה תַּהֲרֹֽגוּ

And if a man lie with a beast, he shall surely be put to death: and you shall slay the beast.

Koren Jerusalem Bible, courtesy of Sefaria.

The Torah tells us to put the animal and man to death, indicating that the animal was alive at the time of the act.

If the animal was not alive at the time of the act, does the prohibition of bestiality still apply?

And if the prohibition does still apply, is the man eligible for the death penalty?