As a 23 year old US citizen, the process for getting your mother a green card is simply to file Form I-130 petition for her and if she is physically in the US after lawful admission with visa (even if since expired) she can concurrently file for her green card [Form I-485]. The whole process should take no more than 8 months. But based on some information you gave, I strongly suggest that you should not do anything until after full consultation with an experienced immigration lawyer. If she was ever in immigration court for any reason in the past, you must confirm that your mother does not have an outstanding order of deportation that may warrant her filing a motion to reopen before she applies for green card. Otherwise, in filing a petition with CIS will invite the attention of ICE "DRO" Detention & Removal Operations Unit whose only duty is to locate, apprehend and remove aliens with pending deportation orders. Contrary to your belief that her case was just closed, once deportation is shown, an immigration judge does not close a case but must instead issue a deportation order. Therefore, you need to proceed very carefully and so hire an experienced immigration lawyer to help you.
Answered on May 08th, 2013 at 4:28 AM