NY subway bomb plotter waiting in wings as witness

Nearly a year after pleading guilty in a foiled terror plot targeting the New York City subways, al-Qaida associate Najibullah Zazi hasn't been back in court and probably won't be until he's called as a witness — possibly against his own father.
The elder Zazi is charged with hiding evidence in the case against his son in an obstruction of justice case headed toward trial later this year. And as part of a plea deal, the government can require his jailed son to testify at that trial or that of Adis Medunjanin, an alleged accomplice in the plot to blow up the subways with homemade backpack bombs.
Prosecutors have declined to discuss potential witnesses.