EMH: I'm afraid that won't help you determine if he's telling you the truth, Commander. An ARA depends on making a baseline comparison with the known response for a given species. Any Tom, Dick or Harry from the Alpha Quadrant, I could probably help you, but not with any of the new species of the Delta Quadrant. Regarding his veracity, it may help you to know that if we'd arrived an hour later, he would have been dead from his injuries.