Reports: Bomb suspect's father told authorities he was a terrorist in 2014, later recanted

This undated photo provided by the New Jersey State Police shows Ahmad Khan Rahami, wanted for questioning Monday, Sept. 19, 2016, in bombings that rocked the Chelsea neighborhood of New York and the New Jersey shore town Seaside Park. (New Jersey State Police via AP)

Investigators Monday said a notebook recovered from the man suspected of planting bombs in New York and New Jersey reveals Ahmad Khan Rahami wrote about the Boston Marathon bombers and Anwar al-Awlaki -- a U.S. born cleric turned senior recruiter for al-Qaeda.

Authorities are still trying to piece together a motive for the bombing in New York that injured 29 people. The notebook, investigators said, could help paint a more clear picture of the suspect.

A senior law enforcement official told CNN the notebook appeared to be damaged by gunfire.

The notebook was found after a shootout with police, for which Rahami was charged with five counts attempted murder of police officers.

One official told the New York Times that the book included references to "killing the kuffar," or unbelievers.

According to the Times, investigators also said that Rahami's father told police his son was a terrorist in 2014. The Joint Terrorism Task Force opened an assessment and interviewed the father, but he recanted the allegation.

At the time, Rahami had been arrested for allegedly stabbing his brother during a domestic dispute. A grand jury reportedly declined to indict him.

This story will be updated.

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