Here's how it works.
Wife has a terminal dz and is suffering daily.
She decides she doesn't want to suffer anymore.
She and husband do research into ways to end her suffering.
They decide on how they want to do it.
Wife is in hospice care, which means she is not expected to last much longer.
Husband acquires the materials needed. (in this case, a large plastic bag and a tank of helium).
If she is able to, she places the bag over her head and turns on the helium tank. If she is not physically able, he helps her.
After she has passed away, husband calls the authorities to report that his wife has passed away. Before they arrive, he puts the helium tank and bag in a closet.
When she is pronounced dead, no one asks for an autopsy because her death was expected.
