Mexico's 'I'm tired now' attorney general steps down

Mexico's much-maligned attorney general, who has faced public anger over the investigation into the presumed slaughter of 43 students, will step down Friday to take up another cabinet post.
Jesus Murillo Karam will be sworn in as the new minister of rural, territorial and urban development at a ceremony presided by President Enrique Pena Nieto, the government said.
Murillo Karam's exit was widely expected under a reform that will turn the federal prosecutor's office into an autonomous department.
But he was also heavily criticized by human rights groups, protestors and parents of the 43 students over his handling of the case.
Murillo Karam concluded that the students were abducted by corrupt local police officers who handed them over to a drug gang that killed the young men and incinerated their bodies in September.
But Human Rights Watch, Amnesty International and an independent team of Argentine forensic experts have questioned his conclusions, saying it was too soon to declare the students dead without more physical evidence. Only one body has been identified among charred remains.
Murillo Karam also drew public scorn when he declared "I'm tired now" to wrap up a press conference in November in which he first indicated the students were probably dead.
His words became a trending topic on Twitter in Mexico and a rallying cry for protestors, with the Spanish hashtag #YaMeCanse.
The case has turned into a political headache for Pena Nieto, who is facing the biggest challenge of his administration amid relentless drug violence.
Murillo Karam is a member of Pena Nieto's Institutional Revolutionary Party and a former senator, congressman and governor.
Pena Nieto will name Senator Arely Gomez as the interim attorney general, according to a source familiar with the matter.
Her appointment is a surprise because Gomez had requested leave from her senate seat on Thursday to take up a different job within the attorney general's office.