Possible, just not admissible. I'd let the spirit make a Memory test against anything that's occurred - though depending on the general nature of the spirit, I would give it a penalty or bonus due to the nature of the event(s) you're talking about. (It's a spirit, after all, not a god.) Murders, beatings, and other violence would incur a penalty with a spirit that's mostly used to nice stuff, or who has a shaman in the area that's basically been good to it, except if the violence happened to their 'pet people'. A darker, more nasty spirit - one that, if it became a Free Spirit, might turn into a shadow type - would tend to pay more attention to that sort of thing. On the flip side there, though, is the risk of summoning that sort of lingering malevolence ... because in all cases, you're going to be using services to gain the information ...