Poke Holes Everyone

1 - 'Someone' found a wasted chick and convinced her (possibly under duress)to follow them to the 14th(15th) floor where they used the fire escape to gain access to the roof.

2 - 'Someone' then convinced her to climb another ladder to get to the highest part of the 150-ft tall building. YAY

3 - 'Someone', then convinced her to climb down off the opposite side onto the tank tops but then forced her into the water tank.

4 - 'Someone' then sealed the tank up and left her to asphyxiate before she could drown, explaining the confusion regarding drowning and cause of death in the coroner's report.