A few months ago, when Hawk Howard used the Howard Family's connections to track down Uncle Hao in the Golden Triangle, someone from over there got in touch with him and asked him to come to Switzerland to take care of Leah.
Not long ago, Hawk Howard finally learned that the person was actually Leah's biological older brother, the most fearsome warlord in the Golden Triangle, Griffith Squire.
Only then did he really confirm that Leah was Crystal Landon. After learning about his past with Crystal Landon, the other party had him come over to keep Richard Shaw in check. Hawk Howard was a high-IQ prodigy since childhood; in an instant, he inferred from subtle clues that there must be some kind of feud between the Squire Family and the Shaw Family.
Setting aside why Crystal Landon became Leah Squire, just Griffith Squire's guarded attitude toward Richard Shaw, and the fact that she's obviously safe and sound yet has stayed hidden all this time, was enough to explain a lot.
