According to the criminal complaint, Grafton Thomas was in possession of handwritten journals that referred to Adolf Hitler and Nazi culture, as well as drawings of the Star of David and a Swastika. His internet browsing history also included several noteworthy searches, including "German Jewish Temples near me," "Why did Hitler hate the Jews?" and "Prominent companies founded by Jews in America."
On Dec. 28, the night of the attack, the phone's internet browser was used to access an article titled: "New York City Increases Police Presence in Jewish Neighborhoods After Possible Anti-Semitic Attacks. Here's What To Know," the complaint said.
Thomas, a scarf covering his face, entered the rabbi's home, located next door to a synagogue, and said "no one is leaving," according to the complaint
It was an ambush that Governor Andrew Cuomo said Sunday was an act of domestic terrorism fueled by intolerance and a "cancer" of growing hatred in America.
Police tracked Thomas to Manhattan and made an arrest within two hours of the attack Saturday night in Monsey. Thomas had blood all over his clothing, smelled of bleach but said "almost nothing" when officers stopped him, officials said.
Related: What we know about the suspect, Grafton Thomas
Surveillance video showed Thomas leaving the scene after the attacks.
An automated license plate reader alerted officers that the suspect's car had crossed over the George Washington Bridge into New York City about an hour after the attack. Thomas was stopped and taken into custody about 20 to 30 minutes later, NYPD Commissioner Dermot Shea said.
Security camera footage the NYPD made public Sunday night showed two officers approaching Thomas' sedan with guns drawn before the suspect placed his hands on the roof of the car and he was put in handcuffs.
One witness described the attack as a chaotic scene punctuated with panic and screams.
Thomas, 37, was arraigned Sunday and pleaded not guilty to five counts of attempted murder and one count of burglary. Bail was set at $5 million, and he remains jailed.
He appeared in federal court in White Plains Monday to face five counts of obstructing the free exercise of religious beliefs by attempting to kill with a dangerous weapon and causing injuries.
Attorney Michael Sussman said Monday that he talked to Thomas for 35 minutes.
"I can tell you that I heard nothing during that conversation that he is a domestic terrorist, that he intentionally targeted this in that sense," he said. "I can't get into the detail of what he was doing and why he was doing it. I'm not sure he can honestly yet get into that detail and understand his own behavior. But I do feel it important to say this is the action of an individual who for a long time has...been treated in mental health facilities."
Sussman said he and the family's pastor, the Rev. Wendy Paige, reviewed "scores of papers which frankly show the ramblings of a disturbed individual, but there is no suggestion in any of those ramblings in pages of those writings of an anti-Semitic motive or any anti-Semitism."
Thomas' criminal history includes an arrest for assaulting a police horse, according to an official briefed on the investigation who was not authorized to discuss the matter publicly and spoke to The Associated Press on condition of anonymity. A lawyer representing Thomas at the arraignment said he had no convictions.
The Greenwood Lake street where Thomas lived with his mother, about 20 miles from Monsey, was blocked with police tape Sunday as FBI agents and police officers carried items from their home.
Rev. Paige said Thomas has been suffering from mental illness and that his family believes that condition was the cause of the alleged stabbings - not hatred toward Jewish people. She said his family is sorry for the pain he has caused.
Thomas' family released a statement, saying in part:
Grafton Thomas has a long history of mental illness and hospitalizations. He has no history of like violent acts and no convictions for any crime. He has no known history of anti-Semitism and was raised in a home which embraced and respected all religions and races. He is not a member of any hate groups.
The stabbings on the seventh night of Hanukkah left one person critically wounded, Cuomo said. The rabbi's son was also injured, he said.
The attack was the latest in a string of violence targeting Jews in the region, including a Dec. 10 massacre at a kosher grocery store in New Jersey. Last month in Monsey, a man was stabbed while walking to a synagogue.
Cuomo said Saturday's savagery was the 13th anti-Semitic attack in New York since Dec. 8 and endemic of "an American cancer on the body politic."
"This is violence spurred by hate, it is mass violence and I consider this an act of domestic terrorism," Cuomo said. "Let's call it what it is."
Ramapo Police Chief Brad Weidel said it was unclear why the rabbi's house was targeted. According to the official briefed on the investigation, authorities do not believe Thomas is connected to recent anti-Semitic incidents in New York City.
Sen. Charles Schumer called the growing spate of hate crimes a national crisis and demanded much stronger federal actions to bring relief to at-risk religious organizations.
"The Monsey attack on the Jewish community was cowardly and callous, and it struck even more terror into the Jewish community, which was already reeling from the horrific attacks and cold-blooded murders of other orthodox Jewish community members in Jersey City just days ago, not to mention an alarming spate of other attacks against the New York area Jewish community," Schumer said. "But what should alarm each and every American across this country is that the Hanukkah attack is part of a cascade of violence and intolerance as the state of hate in America has risen to a boiling point that demands a much stronger federal response, because we are in a crisis."
Schumer's plan called for the government to dramatically increase not-for-profit security grants and support for federal programs to prosecute hate crimes.
The stabbings happened around 10 p.m. Saturday at the home of Rabbi Chaim Rottenberg, located next door to his Congregation Netzach Yisroel synagogue. The large house on Forshay Road remained cordoned off with yellow crime-scene tape early Sunday. By evening, the tape was gone and a fully lit menorah shone from a window.
"The guy came in wielding a big knife, sword, machete - I don't know what it was," said Josef Gluck, who hit the assailant with a coffee table during the attack. "He took it out of his holder, started swinging."
The dining room, he said, emptied in split seconds. While inside the home, the assailant didn't say a word as he carried out the attack, he said.
Levy Kraus, 15, said he was near the rabbi's home when he saw a tall man enter with an object.
"He had something in his hand. It looked like an umbrella. It was covered," Kraus said.
Later, he said he saw the man rushing out of the house and scream at someone, "I'll get you."
Rabbi Motti Seligson, the media director of the Chabad Lubavitch movement, said witnesses told him that people fled the house and went to the synagogue where they locked themselves in. Rabbi Rottenberg led the service at the synagogue later, he said.
Weidel said a witness saw the suspect fleeing in a car and alerted police to the license plate number. Police entered that information into a database and used plate reader technology to track the vehicle to Manhattan, where Thomas was arrested.
"It was critical to the case," Weidel said.
Thomas played football for two seasons at William Paterson University in New Jersey.
Monsey, near the New Jersey state line about 35 miles north of New York City, is one of several Hudson Valley communities that has seen a rising population of Hasidic Jews in recent years.
At a celebration in Monsey on Sunday that was planned before the shooting, several members of the community stood guard armed with assault-style rifles. They refused to give their names when approached by an AP journalist, but they said they were there to defend their community.
Jewish communities in the New York City metropolitan area have been left shaken following the deadly Dec. 10 shooting rampage at a Jersey City kosher market.
Six people - three people who had been inside the store, a police officer and the two killers - died in the gun battle and standoff that New Jersey Attorney General Gurbir Grewal has said was "fueled" by hatred of Jews and law enforcement.
Last month, a man was stabbed while walking to a synagogue in the same town that was the site of Saturday night's attack; he required surgery. It's unclear whether the assailant has been arrested.
And this past week in New York City itself, police have received at least six reports - eight since Dec. 13 - of attacks possibly motivated by anti-Jewish bias. Mayor Bill de Blasio said Friday that police presence would increase in Brooklyn neighborhoods home to large Jewish populations.
Additional New York City police officers were being be sent to areas of Brooklyn with high Jewish populations, along with lighting towers and additional security cameras, de Blasio said.
The mayor also announced the formation of multi-ethnic, interfaith safety coalitions that would meet to strategize about disrupting potential hate crimes before they happen. He said some city schools in Brooklyn will also incorporate hate-crimes awareness into their curriculum.
"The Jewish community is utterly terrified," Evan Bernstein, the regional director of the Anti-Defamation League of New York and New Jersey, said in a statement. "No one should have to live like this. How many more times will it take for people in the Orthodox Jewish community to be terrorized with violence before something changes?"
The Associated Press contributed to this report.
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