The Massachusetts dad of three accused of killing his wife unexpectedly copped to getting rid of her body just as jury selection in his murder case began Tuesday. Brian Walshe, 50, admitted to two of the three counts he faces, including misleading police and disposing of a body. But he plans to defend himself against accusations he killed Ana — with whom he shared three kids — at his upcoming Dec. 1 trial. “Did you in fact willfully mislead various law enforcement … with intent to impede or