Once the butcher is dead, look to each sides of the room, you will see piles of flesh. These are the remains of Eva Sarkhoff and her husband. Get rid of them and you will complete the quest.

We were able to stealth all three missions in this quest chain, multiple times, with various combos of rogues and druids. Here are some tips if you want to try stealthing it. Some of these comments were mentioned above as well.

Group
Both four rogues and one druid, or three rogues and two druids works well. I personally prefer 4 and 1 and then the druid focuses on healing. The extra druid does not add much since the bear can't hold aggro and therefore it is better to have a 4th DPS rather than a second healer. You can get away with 58 rogues if they have talent points for master of deception. I think it's best to have 60 druids since they are spotted far more often.

Preparation
To save time, make sure everyone knows to bring lots of heals, bandages, and the druids need mana type pots etc. You will burn through a lot of them and it sucks to get half way and run out of supplies. Usually a few people get to the instance early...get the early rogues to open the four doors that lead to Rattlegore. This saves a lot of time once everyone arrives. Unlock, Vanish, Prep, repeat or die and repeat. Opening the first four doors is not hard, expecially if the people don't mind dying. We found that it saved the most time to meet back at the bridge on the start and clear the four guards...the druids get seen by them too often and it helps to have them removed when getting through the locked door.

Rattlegore
Get to rattlegore stealthed and have one rogue do the pulling. Thin the mobs just like regular 5 man play but if the puller gets an Add, he should vanish in Rattles room and then try again. If he vanishes late, the druid is going to get targettted and die. If you try and fight Rattle and an Add, it's 98% chance of wipe, so just vanish and save time. Do not let anyone grab the key. Tell the group that YOU are the only one who is gonna take the key or your closest guildmate. People burn out fast when dying and then quit the group with the key which sucks incredibly. Anyone can take the key if people look at it and leave it...then it is visible to all. Get the key!

The Locked Door
As stated above, there are two ways to open this door. Have the entire group come back to the starting bridge and wait. Now make a choice...try an unstealthed sprint jump to the top of the door and attempt unlocking, or two people jump down stealthed, one unstealths and runs, uses evasion and a heal to pull aggro and the other stealthed person (you since you have the key) unlocks the door. The first method sounds all fancy and cool, but it goes bad so often that it is just 100 times simpler to use the suicide pull aggro method. Even if you make the door sill jump, you often get tons of aggro from below anyways and get interupted on each open attempt.

Butcher
Now everyone can get to the butcher room. Pull normally to the doorway to clear the room and explain to new players about the green smoke. Also tell new players that if they die during the butcher fight, do not release, so they get credit for his death. Make sure people whack the meat in the corners too. Then everyone exists, cashes in the quest and grabs Bag of Horrors aka Jandice.

Jandice
Again you will have to make a choice, either clear one side of the hall to get to Jandice like normal 5 man, or everyone stealth to her and hide in the back of her room. We found that druids were just easier to spot and so it was hard to get them to Jandice. With 5 people, usually someone gets spotted trying to do the super mario stealth tricks, and so we decided just to clear. I think it is technically possible to stealth to her though since I attacked her solo once as a test and did not pull aggro into the room. If you clear the hall, work quickly, pulling back to the door for the group. Do not dilly dally because by the time you get to her, the room starts respawning and then it's pure hell and everyone wants to quit. When you get to her, and she splits into 10, stay calm since you don't have to beat up all ten, just find her and the extras will fade. If you are successful, again everyone exists and cashes in the quest and grabs Kirtonos and blood of innocence.

Kirtonos
This is straight forward like regular 5 man. We find it is easiest to group in the lower left corner beside the stairs all together. Then bouncing is minimized and DPS is maximized since time is not wasted getting back too him. I used to group at the back gate until I got bounced through the gate and into the room full of angry casters. lol

Other Tips
Stuns are your friend. You can't cheap shot every boss but you can kidney almost all of them. Have the rogues ready to stun as much as possible and to space the stuns out so you go kind of in order to maximize the frozen time of the boss you are attacking.

Oil of Immulsion is very handy. Many people have never tried the oil but it is great AOE for someone who can't AOE. We like to take 10 each when trying all three quests. The four attackers use 1-2 per boss. This is 1000-2000 more damage on the target and often makes the difference if you are going to live or die in a close fight.

If your armor goes yellow, you or others can run to Chillwind for fast armor repair.

These quests are especially worthwhile if you are an alchemist since the spectral essence lets you buy major mana and transmute water to air on a 24 hour timer. This quest series is also important if you are a rogue wanting the darrow spike dagger quest series which follow.

Hope these tips were useful for those wanting to try the three quests stealthed.

Both remains are in the same room as the doctor, just off to the side. Looking back on it now, I can't believe I missed them.