Money, and more money. Seems like all that matters to some.

We thought it was a coincidence we crashed there, but it turns out that was fabricated, too. Charon kept presence there with a group of pirate mercenaries, and with Charon's resources they'd managed to make use of some of the alien tech present -- a tractor beam, of sorts. Any ship that happens to wander within range gets pulled down.

[ He doesn't say why, figures Miles would see the reasons plainly enough. ]