MONCTON, N.B. - A young New Brunswick mother who spent two-and-a-half-months as a fugitive has been formally charged with first-degree murder and arson.

Marissa Shephard made her first court appearance Wednesday after being arrested under a Canada-wide warrant without incident outside a hotel in Moncton on Tuesday.

Shephard, 20 is charged in the Dec. 17 killing of 18-year-old Baylee Wylie, whose body was found in a burned-out triplex.

Days after the Moncton blaze, 18-year-old Devin Morningstar was charged with first-degree murder and arson.

Tyler Noel, 18, was arrested on a Canada-wide warrant Jan. 9, in Petitcodiac, N.B., and has also been charged with first-degree murder and arson.

Two people arrested Tuesday with Shephard -- Krystle Toole, 32, and Stephen Nagle, 22 -- have been charged with being accessories after the fact to first-degree murder for aiding Shephard. Nagle is the father of Shephard's young son.