People v. Mbaabu, 213 Cal.App.4th 1139, ____, 152 Cal.Rptr.3d 818, 826 (4th Dist. Feb. 14, 2013) (Third, the defendant failed to exercise diligence in presenting his claims timely. The Padilla decision came down approximately three weeks after the defendant entered his plea, and was issued more than a year prior to the original motion to reduce the sentence which was later amended to seek to withdraw the plea. Defendant did not appeal the denial of the first motion. Instead, he filed a second motion in the superior court several months later. A petitioner bears the burden of establishing, through his or her specific allegations, which may be supported by any relevant exhibits, the absence of substantial delay. (In re Reno (2012) 55 Cal.4th 428, 462, 146 Cal.Rptr.3d 297, 283 P.3d 1181.)).