 Complete the following phrase:  After Lüthis arrest on tax fraud charges in mid-1989, several parties disputed the ownership of the team. Middlebridge Group Limited, a Japanese engineering firm owned by billionaire Koji Nakauchi, was already involved with established Formula 3000 team Middlebridge Racing and gained control of Brabham for the 1990 season. Herbie Blash had returned to run the team in 1989 and continued to do so in 1990. Middlebridge paid for its purchase using 1 million loaned to them by fice company Landhurst Leasing, but the team remained underfunded and would only score a few more points finishes in its last three seasons. Jack Brabhams youngest son, David, raced for the Formula One team for a short time in 1990 including the season-ending 