Check out page 312 of the Teachings of the Prophet Joseph Smith (not sure what edition it is...blue cover, picture of the Prophet in profile), third paragraph, second sentence. The Son doeth what He hath seen the Father do: then the Father hath someday laid down His life and taken it again...
Not quite an explicit statement that our Heavenly Father was a Savior, but it certainly lends plausibility. I just read this the other day and remembered it when glancing over the board of the day...thank goodness for indices (and for the 100 Hour Board).
- Blue-and-white blood