As far as Alric having some actual, legitimate concerns the thing is that I wouldn't look at Egrimm Van Horstmann being the source of those concerns.
Because if Alric is looking into the death of Hexensohn? or talking to Elspeth about "certain sensitive matters?" Neither of those have been mentioned in the quest about before have anything to do with Egrimm, but they both have a history that has a great deal to do with the very certain grey wizard who stole his right hand man to begin with. And in the former case a certain little book too, if he found enough.
So yeah, taking for a moment the assumption as axiom there's someone in particular connected to his actions, then I'm pretty sure right now that Alric is looking into Mathilde's past.
After all, our actions were directly connected to the death of a great many plotters in the twilight hours of our journeying, which Regimand had to contract out for, and earlier to the death Hexensohn as well, even if the latter is removed by degrees and chance alike. Now he's looking into Tabalecland, and I'm wondering about whether our time as a spymaster (or the EIC currently) has any connection to all that. Because it certainly looks like the path a man might take looking back through our own actions, starting from a notable incident he might have been hired for.