Can someone explain to me how the heck this happened? FYI these three people are all in the same legion.

You were guarding a planet. They targeted you throught said planet dissabling your ship

or their final hit that disabled you was the hit that trigged your hal, this has happened to afew of my targets with very high damage cap and low hull.

This cannot be the case. One player tripped the Halcyon, while another got the killshot.