That didn't bother me at all . I know of at least another instance when a CSI shouldn't have been investigating but it happened. For some reason there was no problem seen with that particular episode.
I never like it when they have someone working a scene when they have a conflict of interest or whatever. It's true that we should be used to that by now (and it isn't just Miami that does it, its all three shows). And I'm sure whatever episode you're referring to bothered me as well, I just forgot to mention it lol (like I forgot to mention it with this episode at first until I saw someone else's comment about that). However, I probably wouldn't have even noticed it in this episode if they hadn't made a point to say Sam was off the case because of what she did. It just made Ryan being back on the case stand out more (and for the record, I don't blame Ryan for that at all).
I know these shows do that all the time, but sometimes its like one week they say "no, you can't work the case, conflict of interest" and the next week they [the writers] seem to forget that rule altogether LOL. I still liked the episode a lot.
I'm just saying the writers need to make up their minds about that sort of thing. If they want to always allow them to work a case even if there's a conflict of interest, fine... but don't have them do that one week and the next week say the opposite LOL. Be consistant. That's all I'm saying.