question:  Why do the Altairians let Zeckler go?
context: There was a startled gasp from within, and a skinny, gnarled little man suddenly appeared in the guard's light, like a grotesque, twisted ghost out of the blackness. I've got three million credits sitting in the Terran Consulate on Altair V, just waiting for me to walk in and pick them up. And the Terran Consulate isn't willing to sell all the trading possibilities here down the river just to get you out of a mess. "You've committed the most heinous crime these creatures can imagine, and they're going to get you for it if it's the last thing they do. They spread out from Terra with the first wave of exploration—the slick, fast-talking con-men who could work new territories unfettered by the legal restrictions that soon closed down the more established planets. The first men in were the richest out, and through some curious quirk of the Terrestrial mind, they knew they could count on Terran protection, however crooked and underhand their methods. Altair I had been recognized at once by the Trading Commission as a commercial prize of tremendous value, but early reports had warned of the danger of wildcat trading on the little, musty, jungle-like planet with its shaggy, three-eyed inhabitants—warned specifically against the confidence tactics so frequently used—but there was always somebody, Meyerhoff reflected sourly, who just didn't get the word. You'd have found out that they're marsupials, and that two out of five of them get thrown out of their mother's pouch before they're old enough to survive. They've built up the most confusing and impossible system of barter and trade imaginable, aimed at individual survival, with land as the value behind the credit. They have only the haziest idea what truth represents, and they've shrugged off the idea as impossible and useless." Encroachment on private property is legal grounds for murder on this planet, and twelve of them descended on the same chunk of land at the same time, all armed with title-deeds."
output:  They let Zeckler go because he is the best liar.
options:  They let Zeckler go because he did not murder any Altairians.  They let Zeckler go because he is the best liar.  They let Zeckler go because Altairian law doesn't apply to Earthmen.  They let Zeckler go because he converted to the religion of the Altairian Goddess.