Detlef Guenzel sliced German-born Wojciech Stempniewicz into small pieces . Video reportedly shows him strangling victim using a rope tied to a pulley . Defence argued victim could have stopped strangulation if he wanted to . Guenzel then buried the body parts in the garden of his bed and breakfast . Prosecutors sought lower sentence because Stempniewicz wanted to die .
Detlef Guenzel sliced Polish-born Wojciech Stempniewicz into small pieces . Video reportedly shows him strangling victim using a rope tied to a pulley . Defence argued victim could have stopped strangulation if he wanted to . Guenzel then buried the body parts in the garden of his bed and breakfast . Prosecutors sought lower sentence because Stempniewicz wanted to die .