Matthew Nilo, the lawyer from New Jersey accused in a string of Charlestown sexual assaults from 15 years ago, was indicted by a grand jury Tuesday on charges related to attacking four more women in the North End around the same time.
The 35-year-old, who lived in the North End at the time, is now accused of raping or sexually assaulting eight women between 2007 and 2008. Nilo is now facing seven additional charges following the new indictment — one count of rape, one count of aggravated rape, three counts of assault with intent to rape, and two counts of indecent assault and battery.
“Mr. Nilo denies all the allegations including the latest charges,” his attorney, Joseph Cataldo, said in an e-mail Tuesday night. “You can expect both a legal and factual challenge to the government’s case.”
According to Suffolk District Attorney Kevin Hayden’s office, Nilo attacked four women in the North End, including two attacks on the same woman 11 days apart. Hayden’s office said the assaults happened in January 2007, July 2007, January 2008, and July 2008.
“The incidents followed a similar pattern. The victims were attacked while they were walking alone, in the dark, either at night or early in the morning,” Hayden’s office wrote in a statement announcing the indictment.
Nilo, an attorney who attended Boston Latin School, was hauled back to Boston from his apartment in New Jersey after a cold case investigation by Boston police and federal authorities connected him to the Charlestown assaults. In those, prosecutors have said, Nilo picked up women downtown and brought them to Terminal Street in Charlestown, where he assaulted them.
He was charged earlier this month with raping three women and attempting to rape a fourth on Aug. 18, 2007, Nov. 22, 2007, Aug. 5, 2008, and Dec. 23, 2008.
Nilo has pleaded not guilty to those charges.
Few details surrounding the new charges were available Tuesday night. In a statement, Hayden said more information will be released when Nilo is arraigned.
“But I can tell you today that DNA evidence played a role in these new indictments,” Hayden said.
Authorities have said they used a combination of new procedures to connect Nilo to the Charlestown rapes. Those cases were among the 100 such cases that Boston police reinvestigated over the past few years through a federal grant to revisit old DNA samples with current improved technology.
The police worked with the FBI to do forensic genetic genealogy testing, which involves running a DNA profile against databases for familial matches, rather than only for a direct match.
Nilo’s attorney has told the Globe he intends to challenge the constitutionality of such evidence collected by police and prosecutors used to arrest Nilo.
Nilo will be formally charged on the new counts at his next court appearance on July 13. Nilo was released June 15 after posting $500,000 cash bail on the previous charges.
He was fitted for a GPS bracelet to monitor his location and released on the conditions that he surrender his passport, have no contact with victims or witnesses, and stay 1,000 feet from Terminal Street.
Lori Pinkham, one of the four women who authorities say Nilo assaulted in Charlestown, spoke out against him in an interview earlier this month after he made bail.
“I’m just upset right now that he ... has lived this lavish lifestyle and all these people that think they know him have no idea how evil he is, and how evil these crimes were,” she said. “I just hope that I can help encourage somebody else to come forward.”
Sean Cotter can be reached at sean.cotter@globe.com. Follow him @cotterreporter.