Federal prosecutors charged Monday the alleged-attacker accused of carrying out a machete attack that wounded five Jewish worshippers attending a Hannukah celebration at a rabbi’s home in Monsey, New York Saturday night, as reported by The New York Times.

In the criminal complaint, officials say the suspect kept handwritten journals with outright expressions of anti-Semitism including references to Hitler and drawings of swastikas. They also located several alarming searches in his phone which included, “Why did Hitler hate the Jews,” “German Jewish Temples near me” and “Zionist Temples.”

On Sunday, the suspect pleaded not guilty to five counts of attempted murder and one count of burglary. His family also came forward with a statement claiming he has a history of mental illness, but no history with anti-Semitism.