Philip Markoff, the former medical student accused of killing a 25-year-old masseuse he met through Craigslist is being arraigned in Boston today for first-degree murder and other charges.

Philip Markoff is expected to be in Suffolk Superior Court on Monday morning. He was indicted by a grand jury Thursday after a two-month investigation.

Suffolk County District Attorney Daniel Conley told CBS' The Early Show Monday that his office continues to receive new information on the case, though he admitted most of it has been unhelpful.

Despite that, Conley said, "We believe that we've built a very strong case against this defendant."

He added that Markoff's fiancée, Megan McCallister, has been cooperative, but declined to say whether she would be a witness for the prosecution.

Conley said the case probably won't reach trial for at least a year.