I ran across some great information from www.immigrationdefenselproject.org on the Padillia case. Here’ is the main points

Some Key Padilla Take-Away Points for Criminal Defense Lawyers

• Deportation is a “penalty,” not a “collateral consequence,” of the criminal proceeding. The Court held that deportation is a “particularly severe ‘penalty’” and made clear that the “direct vs. collateral” distinction does not apply to immigration consequences and does not preclude ineffective assistance of counsel (IAC) claims based upon failure to provide correct advice about immigration consequences.

• Professional standards for defense lawyers provide the guiding principles for what constitutes effective assistance of counsel. In support of its decision, the Court relied on professional standards that generally require counsel to determine citizenship/immigration status of their clients and to investigate and advise a noncitizen client about the immigration consequences of alternative dispositions of the criminal case.

• The Sixth Amendment requires affirmative, competent advice regarding immigration consequences; non-advice (silence) is insufficient (ineffective). In reaching its holding, the Court expressly rejected limiting immigration-related IAC claims to cases involving misadvice. It thus made clear that a defense lawyer’s silence regarding immigration consequences of a guilty plea constitutes IAC. Even where the deportation consequences of a particular plea are unclear or uncertain, a criminal defense attorney must still advise a noncitizen client regarding the possibility of adverse immigration consequences.

• The Court endorsed “informed consideration” of deportation consequences by both the defense and the prosecution during plea-bargaining. The Court specifically highlighted the benefits and appropriateness of the defense and the prosecution factoring immigration consequences into plea negotiations in order to craft a conviction and sentence that reduce the likelihood of deportation while promoting the interests of justice.

Also , thanks to www.lawofcriminaldefense.com