Phil Spector’s new lawyer has stepped up his campaign to disqualify Los Angeles Superior Court Judge Larry Paul Fidler from the music producer’s murder retrial over allegations of bias.

Doron Weinberg appeared with Spector on Friday and told the Superior Court he wouldn’t be ready for the case until at least September.

In addition, Weinberg filed a 44-page document outlining alleged examples of bias by the judge, including a move to stop a Spector’s wife Rachelle Short and a potential witness from talking.

The papers also contained claims Fidler withdrew a jury instruction and crafted a new one after jurors first announced they were deadlocked in September 2007.

Weinberg added that according to U.S. law, the judge can’t rule on his own disqualification motion.

Fidler set another hearing for May 22nd, when the trial date is expected to be set.

Spector is accused of murdering actress Lana Clarkson at his Alhambra, California home on  February 3, 2003.