RCMP arrested the stepfather of the Sullivan children missing from Nova Scotia, on unrelated charges, police told CityNews. Martell is the stepfather of Jack, 5 and Lilly, 6, Sullivan, who were last seen in the rural town of Lansdowne Station, N.S. RCMP have not found anything to suggest where the Sullivan children are. On May 9, Brooks-Murray was specifically asked if the children’s stepfather was physically abusive. The children’s biological father, Cody Sullivan, underwent a polygraph test on June 12 and was deemed to be truthful.