I cannot blame him I would not want to defend her either.
HOWEVER.... I do believe that Lawyers can remove themselves, especially if they do NOT believe the client is innocent, and would not be able to represent them with conviction.
I would like one of our legal heads to reply to this.
No. From the Court Minutes:
"IT IS ORDERED denying Defendants Renewed Motion to Withdraw."
http://www.courtminutes.maricopa.gov/docs/Criminal/032011/m4655152.pdf