> § 168 StGB.

I don’t know, seems like that leaves some loopholes, you just have to get pre-death approval ;)

> (1) Whoever unauthorizedly takes away from the custody of the entitled person the body or parts of the body of a deceased person, a dead corporeal fruit, parts of such or the ashes of a deceased person, or whoever commits insulting mischief thereon, shall be punished by imprisonment for not more than three years or a fine.

translated from https://www.gesetze-im-internet.de/stgb/__168.html