A fugitive -- on the lam for five days from the grisly weekend murders of a couple in Peabody -- may be driving a carjacked Honda, Essex District Attorney Jonathan Blodgett's office confirmed this morning.State police spokesman David Procopio urged the public to immediately notify authorities if they spot a gray 2006 Honda Accord four-door sedan with Massachusetts license plate 7KLY80.Murder suspect Wes Doughty, 39, should be considered armed and dangerous and should not be approached, Procopio said.