Jamie William Gallant, 18, is being taken to Dartmouth provincial court in this Decembern 2011 photo. (CBC)

Crown prosecutors say one of two teenagers charged with killing an elderly Dartmouth woman will plead guilty and be sentenced Wednesday.

Jamie Gallant, 18, was charged with first-degree murder in the death of Lavinia Campbell, who was found dead in her Jackson Road home last December.

He was also charged with robbery and break-and-enter.

A 16-year-old accomplice has already reached a plea deal for a manslaughter charge.