In re Douglas, 200 Cal.App.4th 236, 132 Cal.Rptr.3d 582, 586 (4th Dist. Oct. 27, 2011) (The only excuse Defendant offers to explain the delay between conviction in 1997 and this petition in 2010 is his mistaken belief regarding the registration requirement. California law does not condone willful ignorance: A petitioner will be expected to demonstrate due diligence in pursuing potential claims. If a petitioner had reason to suspect that a basis for habeas corpus relief was available, but did nothing to promptly confirm those suspicions, that failure must be justified.); quoting In re Clark (1993) 5 Cal.4th 750, 775.