Aedar is readily able to find a wide collection of ropes, sacks, and rags, etc to restrain the bird creature. Meanwhile Klaes spies a door to room under the stairs. As he approaches the door he can see it is hanging loosely on broke hinges. What's more he can her the sound of breathing coming from under a tarpaulin towards the back of the room about 10 feet away from the door.

Aedar nods to himself as he restrains the bird creature with several ropes. "This should be sufficient." He then turning to Ophelia and Eryn adds "Let's see if our friend Klaes has found Volo's friend." Giving a last glance at the bird creature, Aedar, sword at the ready, walks towards Klaes's location.

Klaes signal for the group not to make any noise. He slowly goes to the tarpaulin and lifts it slowly, to reveal what is under it.

As Klaes lifts the tarpaulin the human underneath clambers to his feet and picking a few bits of what appear to picked herring off his clothes bows and says "my name is Renaer Neverember, my thanks for dealing with those Kenku but who may I ask are you and what are you doing here?"

PM for Klaes and Aedar

After the human speaks, Ophelia says "Hello, Mr. Ranaer. We are here to find someone called Floon Blagmaar. Have you happened to see him anywhere?" To the party, she says "They must have multiple prisoners. Maybe one of them knows where Volo's friend is."

"Aedar Silverblade at your service Lord Neverember" replies Aedar "As my friend Ophelia just said, we are searching one of Volo's friends, Floon Blagmaar."
He nods to Ophelia "I agree with you, those Kenku were probably keeping more than one prisoner." He then adds "Good thing that we left one of them alive, we can try to further interrogate them after we have searched this warehouse." 

Klaes tips his top hat. "Klaes Ashford. At your services, sar."

In response to Ophelia's question Renaer says "at the end of our night, Floon was how do you say somewhat under the weather. If I'd left him on his own who knows where he'd have ended up. Anyway I decided to walk him home but not long after we set out we were jumped by a bunch of thugs on Zastrow street who brought us back here!"

"So unless those Kenku moved him to another location, it's possible that Floon is still here somewhere." says Aedar "Let's search the warehouse." He then methodically starts searching the warehouse for Floon or any possible clues that may lead to his location. (Investigation 20)

It takes the party about 45 minutes to do a thorough search of the warehouse. During this time they find behind a secret door two wooden crates. The first contains four wood-framed paintings, wrapped in leather, depicting Luskan, Neverwinter, Silverymoon, and Baldur’s Gate. The second contains fifteen silver trade bars, weighting about 10 pounds each,  which are black from corrosion.  In other crates they find  weapons, rations, boots, black uniforms, and assorted other gear. Finally in a crate up on the balcony tucked away at the back they find hundreds of pairs of wooden-soled sandals that Klaes remembers were all the rage last summer.

But they do not find Floon.

As the party reconvenes after searching and is standing near the main door it suddenly crashes open and 13 members of the City Watch rush inside.

Klaes raises his hands, and looks to the other that perhaps they should do the same. "Greetings, we are herea searching for a missing friend, and we wish for no trouble."

Aedar follows Klaes's example and raises his hands "Those Kenku kidnapped a friend of ours and Lord Neverember." Aedar points at the dead Kenku and at the one that the group tied up. "They are members of Xanathar's guild, or at least I think so as they shouted his name when they attacked us."

@DM 

The leader of City Watch spies Renaer standing slightly behind the party "my lord Neverember, what are you doing here?" Renaer replies "Captain Staget isn't it. Its a long story but the short version is that these fine gentlemen, lady and um" looking at Ophelia "their companion have rescued me from a less than desirable situation." The captain looks over at the bodies and the one remaining bird creature "looks like the Zhentarim and the Xanathar Guild had a bit of a set to and this time the Zhents came off second best." He then summons one of his  men "get that Kenku ready for being taken down to the Watch house."

"Volo's friend is not here. Maybe if walk from here to Zastrow street, where Floon and Renaer were attacked, we may find some tracks or clues."  says Aedar to the rest of the group.
"If we do not find anything, we could return to the street in the Dock ward where the City Watch arrested three members of the Black Network. Tymora's willing, we may find something that the Watch missed." Aedar pauses a moment "I fear that Volo's friend is now prisoner of the Zhentarim."

"Let as hope that we du not have to meet those fine Zhent gentlemen." Klaes fixes his suit, and prepares to follow Aedar to Zastrow Street.

In line with Aedar's suggestion the party makes their way back to Zastrow Street. It is now about 10 pm and the full moon has risen bathing the streets in its light. However, as it is  getting steadily colder and its also the end of a public holiday the streets are fairly empty.

Aedar rubs both his hands together hoping to fight the cold as the group reaches Zastrow Street. "It's a long shot, but maybe we can find clues or even a witness of the assault." says the bard as he starts searching the street (Investigation 15). 

Klaes feels the cold, but doesn’t others know, and he looks perfectly fine in his purple suit. As Aedar looks for clues, he helps looking around as well.

Investgation: 12

(LOL. Same roll, hopefully two minds are better than one.)

As stated previously the street is fairly deserted except for a group of people clustered around a small stall selling mulled wine.

Seeing as Ophelia is not used to the cold, she gets a bit chilly. She then finds a thick leaf to wrap around herself. Then, she flies above the small wine stall to see if anything is going on. 

Investigation: 13