The following comes from comments posted to Reddit regarding this video: Mirror of deleted video: "KILL ROOM FOUND! Pegasus Museum owned by Alefantis"

I've copied the comments in full.

Video is cued to 7:45 https://youtu.be/DnT9QzmMAe4?t=7m45s

https://pbs.twimg.com/media/C1buFu6VIAAvORp.jpg

Source: https://www.reddit.com/r/conspiracy/comments/5m3kbn/youtuber_claims_to_have_found_the_killroom_at/dc0ozxl/

Via MiG29ToW

7:45 - check out the random person just "hanging out" on the roof, facing the playground, probably on a cell phone, in a "watchtower" type structure that clearly was installed some time after August 2014.

Nope, not suspicious or out of the ordinary at all.

Response

Source: https://www.reddit.com/r/conspiracy/comments/5m3kbn/youtuber_claims_to_have_found_the_killroom_at/dc0u8mr/

Via GrayManTheory

in a "watchtower" type structure

The name of the LLC is Castellum Achilles LLC.

A castellum is a Roman watchtower.

Achilles could represent a lot of things, but there is this bit in Wikipedia:

"The Romans, who traditionally traced their lineage to Troy, took a highly negative view of Achilles.[39] Virgil refers to Achilles as a savage and a merciless butcher of men,[40] while Horace portrays Achilles ruthlessly slaying women and children.[41] Other writers, such as Catullus, Propertius, and Ovid, represent a second strand of disparagement, with an emphasis on Achilles' erotic career."

Alternately, since Achilles symbolized strength, the name could be taken to mean that they are on the lookout for people of power (to ensnare and corrupt) or protecting people of power.

Edit: Just realized Achilles is just the middle name of James Alefantis. It could still be a double meaning, but now it seems like his own personal watchtower - over the kiddie park.