Even without kittens, house cats will often take a captured small animal inside (still alive) and dump it near their caretaker and expect them to finish the job.

Our cat has only access to a confined (extremely high walls) garden (largely left to grow wild for environmental reasons) due to proximity to a road where people drive extremely badly, and still manages to occasionally succeed at bringing something in, usually dumping it at someone’s feet and going “ok you do it”.