(CBS/WBZ) WAYLAND, Mass. - Eighteen-year-old Nathaniel Fuijita, accused of killing his ex-girlfriend Lauren Astley, had a history of violence according to court documents, reports say.
The specifics of Fujita's alleged past were not detailed because prosecutors said the statements could obstruct the investigation or cause Astley's family further emotional distress.
Jessica Venezia Pastore, a spokeswoman for Middlesex district attorney said his outbursts took place "within the last few years."Middlesex prosecutors argued Fujita's "prior bad acts" outlined in state police requests for warrants to search the home and car of Fujita could prejudice a jury. The documents were ordered impounded, reports the Boston Herald
According the paper, this was the first time prosecutors have publicly alleged that Fujita had a history of violence.
Jessica Venezia Pastore, a spokeswoman for Middlesex district attorney said his outbursts took place "within the last few years."
A bicyclist found Astley's body in a marshy area near Sudbury, west of Boston, July 3.
Astley, 18, was found with a gaping wound to her throat, according to prosecutors, and a bungee cord wrapped around her neck. Astley was killed by strangulation from "a ligature and a wound to her neck using a sharp object," reports CBS station WBZ.
At Fujita's home, police say they found blood on the floor of the garage and a bungee cord nearby. There was also blood found on a door handle, the kitchen floor, the kitchen sink and a bathroom sink.
Investigators say they later found Fujita's bloody clothes and sneakers in a crawl space by his bedroom and that the clothes also had dirt consistent with being in a marsh.
Both Astley and Fujita graduated from Wayland High School this year.
Fujita, was ordered held without bail after pleading not guilty to murdering Astley.