The indictment, obtained by ABC News, charged LaRose with conspiracy to provide material support to terrorists and conspiracy to kill in a foreign country, and making false statements to a government official and attempted identity theft.
LaRose is also accused of making false statements to a government official and of attempted identity theft, a passport she allegedly stole with the intention of giving to an Islamic fighter. The court papers alleged that LaRose reached out through the Internet to jihadist groups saying she was "desperate to do something to help" suffering Muslim people, and that she desired to become a martyr.
She stated in her e-mails "that her physical appearance would allow her to 'blend in with many people' which 'may be a way to achieve what is in my heart,'" the indictment stated.
In her e-mails with five unindicted co-conspirators in South Asia, Eastern and Western Europe, LaRose allegedly agreed to recruit men and women for jihad, to raise money for Islamic fighters, and agreed on the Internet to one jihadist's request to "marry me to get me inside Europe."
In March 2009, the indictment stated, she allegedly received a directive to "got to sweden... find location of [Resident of Sweden] ... and kill him ... this is what i say to u." LaRose was instructed to kill Vilks in a way that would frighten "the whole Kufar [non-believer] world."
Federal officials identified the target as Lars Vilks, who had drawn Muhammed with the body of a dog.
LaRose replied, "I will make this my goal till I achieve it or die trying," according to court documents.
She traveled, according to the FBI, on or around Aug. 29, 2009 to Europe "with the intent to live and train with jihadists" and to "find and kill" Vilks. In September, she joined an online community hosted by Vilks and eventually moved into Vilks' artist enclave in Sweden.
"Today's indictment, which alleges that a woman from suburban America agreed to carry out murder overseas and to provide material support to terrorists, underscores the evolving nature of the threat we face," David Kris, assistant attorney general for the National Security Division of the Justice Department, said in a statement Tuesday. "I applaud the many agents, analysts and prosecutors who worked on this important investigation."
Special Agent-in-Charge Janice K. Fedarcyk of the Philadelphia Division of the FBI said in the Justice Department statement, "This case demonstrates that the FBI and our partners in the law enforcement and intelligence communities must continue to remain vigilant in the face of the threats that America faces, in whatever form those threats may present themselves or no matter how creative those who threaten us try to be. We must use all available technologies and techniques to root out potential threats and stop those who intend to harm us."
U.S. Attorney Michael Levy told the Associated Press the indictment doesn't link LaRose to any organized terror groups.
ABC News' Pierre Thomas contributed to this report.