When will substitute counsel be appointed in a criminal case?

[6 Cal.4th 696] We stress, therefore, that the trial court should appoint substitute counsel when a proper showing has been made at any stage. A defendant is entitled to competent representation at all times, including presentation of a new trial motion or motion to withdraw a plea. For the reasons identified in People v. Fosselman, supra, 33 Cal.3d at pages 582-583, 189 Cal.Rptr. 855, 659 P.2d 1144, justice is expedited when the issue of counsel's effectiveness can be resolved promptly at the trial level. In those cases in which counsel was ineffective, this is best determined early. Thus, when a defendant satisfies the trial court that adequate grounds exist, substitute counsel should be appointed. Substitute counsel could then investigate a possible motion to withdraw the plea or a motion for new trial based upon alleged ineffective assistance of counsel. Whether, after such appointment, any particular motion should actually be made will, of course, be determined by the new attorney.