Peter Madsen

Peter Langkjær Madsen (; born 12 January 1971) is a Danish former entrepreneur and self-taught engineer. He co-founded the non-profit organization Copenhagen Suborbitals and was the founder and CEO of RML Spacelab ApS.
In April 2018, Madsen was convicted of the 2017 murder of Swedish journalist Kim Wall on board his submarine "UC3 Nautilus" and sentenced to life imprisonment.