https://arstechnica.com/cars/2020/09/nikola-founder-bought-truck-designs-from-third-party/

The original design for Nikola’s flagship truck was purchased by founder Trevor Milton from a designer in Croatia, according to two people with knowledge of the matter, despite company claims in a 2018 lawsuit that the vehicle was initially designed by Mr. Milton “in his basement..

The truck, the Nikola One, is at the centre of a $2 billion lawsuit with Tesla, in which Nikola alleges its rival infringed on its patents. Nikola claims in that lawsuit that Mr. Milton began designing the model in 2013, with other company staff later working on it.