A Coast Guard lieutenant who prosecutors accuse of plotting a mass terror attack Googled his targets and whether they might have security protection, according to court documents seen by INSIDER.

Christopher Hasson, 49, was arrested February 15. Prosecutors say he kept a stockpile of guns and hundreds of rounds of ammunition in his Maryland home.

Court documents allege that Hasson was following instructions laid out in the 1,500-page manifesto of Norwegian terrorist Anders Breivik, who recommended targeting high-profile, influential figures — so long as they weren't well-protected.

A Coast Guard lieutenant who intended to "murder innocent civilians on a scale rarely seen in this country" made a series of chilling internet searches in the last two years to help identify targets, federal prosecutors allege.

Christopher Hasson, whom prosecutors describe as a domestic terrorist, was arrested February 15 amid a stockpile of 15 guns and more than 1,000 rounds of mixed ammunition, court documents reviewed by INSIDER show. (The full criminal complaint is embedded in full at the bottom of this article.)

Hasson was an avowed extremist who despised "the west's liberal degeneracy" and studied a 1,500-page manifesto written by the Norwegian right-wing terrorist Anders Breivik, prosecutors alleged in a motion filed Tuesday to keep Hasson detained until trial.

"I am dreaming of a way to kill almost every last person on earth," Hasson wrote in a draft email he later deleted, prosecutors alleged. "Liberalist/globalist ideology is destroying traditional peoples esp white. No way to counteract without violence."

Nearly one year before his arrest, prosecutors say Hasson sought to identify potential victims by following instructions in Breivik's manifesto, which suggested that targets should be "influential media personalities" who aren't well-protected or have armed bodyguards.

Norwegian right-wing terrorist Anders Behring Breivik makes a salute after he arrives at a courthouse in Oslo on Aug. 24, 2012. Associated Press/Frank Augstein

Read more: Federal prosecutors say US Coast Guard lieutenant plotted 'massive domestic terror attack' targeting civilians, politicians, and journalists

Prosecutors say Hasson Googled Joe Scarborough and looked up his home address

A list of Hasson's internet searches on February 26, 2018, show he looked up a variety of top figures he could easily target who wouldn't be guarded by security, according to the court documents:

"most liberal senators"

"where do most senators live in dc"

"do senators have ss [Secret Service] protection"

"are supreme court justices protected"

Later that year, on December 27, he looked up the MSNBC host Joe Scarborough after viewing a headline that said Scarborough had described President Donald Trump as "the worst ever," the documents said.

Hasson then spent five minutes reading Scarborough's Wikipedia page and personal website, before Googling "where is morning joe filmed" and looking up the address of Scarborough's former home, according to the documents. He scrolled in and out on the location for roughly 35 seconds, the documents said.

MSNBC television anchor Joe Scarborough, co-hosts of the show "Morning Joe," takes questions from an audience on Oct. 11, 2017. Associated Press/Steven Senne

Prosecutors say Hasson made a list of Democratic senators and TV hosts

Weeks later, on January 17, 2019, the documents say Hasson compiled a list of top Democratic lawmakers, activists, and media personalities, often using derogatory nicknames or misspelled names, such as "Sen blumen jew," "poca warren," and "gillibran," likely referring to Sens. Richard Blumenthal, Elizabeth Warren, and Kirsten Gillibrand.

He also named prominent broadcasters like CNN's Don Lemon, MSNBC's Ari Melber, and CNN's Chris Cuomo.

That same day, he spent several hours performing Google searches, according to the documents:

8:54 a.m.: "what if trump illegally impeached"

8:57 a.m.: "best place in dc to see congress people"

8:58 a.m.: "where in dc to congress live"

10:39 a.m.: "civil war if trump impeached"

11:26 a.m.: "social democrats usa."

Hasson was set to appear before US magistrate judge Charles Day on Thursday afternoon, court documents show. He has been appointed a public defender.

Read the full criminal complaint below: