Music mogul Phil Spector will not retain his legal team when he's retried for the murder of actress Lana Clarkson.

Authorities in the US are investigating an internet posting that appeared to threaten the judge in music producer Phil Spector’s murder trial.

DNA consistent with Phil Spector’s genetic markers was found on Lana Clarkson’s breast but was not on the gun that killed her, the bullets in the weapon or under her broken fingernail, a police expert has testified in LA.

The Phil Spector murder trial erupted in intense arguments outside the jury’s presence today over whether the defence can introduce a diary written by gunshot victim Lana Clarkson in which she wrote of her visions of a dead actress, depression over her acting career and fascination with guns.