Why DD might not want Snape for DADA job

[justcarol67]

No: HPFGUIDX 94618

Viridis wrote:
I still think he reason is very mundane: Snape is a former 
criminal, possibly a murderer. Would somebody sentenced for shooting 
people get a licence for shooting school? As much as Snape is 
knowledgeable about (DA)DA, Dumble will be chin deep in letters from 
protesting parents, once the word would leak (and it would, sooner 
or later, trust Rita&co). Than he'd probale have to sack Snape for 
good.
> > 
> 
Potioncat responded: Well, if someone committed murder with a gun, I
wouldn't want them teaching poisons either. <snip>

Carol:
An accused person who is cleared of all charges by a court is not a
criminal, and I'm quite sure that Dumbledore wouldn't hire a murderer
(Barty Crouch, the would-be murderer, was an imposter). As Potioncat
seems to be saying, Potions is quite as dangerous as DADA, and Snape
could "accidentally" poison a student quite easily. Instead, he
carries a vial of antidote in his robes for every class. He also could
easily have "accidentally" killed Lupin through a misstep in the
complicated wolfbane potion. Instead he dutifully prepares it and
makes sure he drinks it, going after him on the one occasion when he
forgets. I have no doubt whatever that Snape is a dangerous man, one
whom Dumbledore wants on his own side, but he isn't a criminal and I
very much doubt that DD would have hired him, much less trusted him
with difficult missions outside the school, if he had ever performed
one of the Unforgiveable Curses. (What did he do for Voldy? IMO he
made complicated and possibly deadly potions.)

Carol