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OKLAHOMA CITY (AP) _ Terry Nichols' lawyers Monday threatened to resign if they are not given more money to defend him on murder charges in the Oklahoma City bombing.

The public defenders told the state Supreme Court that they need another $1.8 million _ on top of the $1.8 million they have already received _ to properly defend Nichols.

Prosecutors said the defense team has already received nine times what any other public defender in a capital murder case has been given.

Oklahoma is giving Nichols an adequate defense, said prosecutor Neal Leader _ ``not a Cadillac defense, but a Ford or Chevy defense.''

A judge ruled in July against the defense attorneys' request for money.

Nichols, 46, is already serving a life sentence after being convicted on federal charges of conspiracy and involuntary manslaughter in the 1995 bombing that killed 168 people. Oklahoma prosecutors have brought state murder charges that could bring the death penalty.

The case is expected to go to trial sometime next year.