Raul Rodriguez was convicted of possession of PCP In Pennsylvania. He filed a motion for post-conviction relief, alleging that his defense attorney did not adequately advise him of the immigration consequences of the conviction or his appellate rights. The motion was subsequently denied, but the state agreed to a settlement, allowing Rodriguez to withdraw his guilty plea. The state court did not specify what reason underpinned the withdrawal. The Third Circuit found that this was sufficient under Matter of Pickering to render the conviction vacated for immigration purposes.
The full text of Rodriguez v. Attorney General can be found here: