I kind of understand the "lawyer up" thing, even if innocent, there could be things you do that are giving up some of your rights. IIRC the boyfriend of the "runaway bride" in Georgia was chided for getting a lawyer, people reading into it that he had something to do with it. Turns out, she ran away on her own, and made up a




and bull story about being kidnapped.
Now, LE judging his reactions.
I just finished taking a statistics class (made an "A", so I know what I'm talking about

)
The way I see it, LE sees all kinds of reactions, and they are trained observers. So, from a statistics standpoint, you are forming a normal curve. The most common reaction to this kind of news (tears, crying, etc.) would be the mid-point of the curve. 98.5% of all reactions would be captured in 3 standard deviations of the mid-point. Anything outside that, would be VERY strange (ie laughing hysterically when told the body was found). Anything getting away from the mid-point would be judged as to the apparent sincerety and appropriate response level. Just think about ALL the possible "normal" reactions and you can see what we are dealing with.
A normal reaction would be crying, but could also include fainting, screaming, disbelief (a strong contender, given the normal grief process) so you have to be pretty far from the normal reaction to peg the meter. OTOH, you have to understand that LE deals with a LOT of human interactions, they can detect when "something is just not right" even if it would be hard to put a finger on why.