But it may be the only defense, however partial it may be, that Kaczynski's attorneys have. FBI agents uncovered a trove of evidence in his Montana cabin, including virtual signed confessions and a signature completed bomb.
1 Whenever the Moon, Earth and Sun are aligned, the gravitational pull of the sun adds to that of the moon causing maximum tides.  Spring tides happen when the sun and moon are on the same side of the earth (New Moon) or when the sun and moon are on opposite sides of the earth (Full Moon).
Since the Sun is so far away, its force does not change very much from one side of the Earth to the other. So the greatest effect from the Sun is seen during New Moon, when the Sun and Moon are in a direct line as seen from Earth, and pulling together on the Earth's oceans. These high tides are called spring tides.