The girls were murdered. It was premeditated. The event happened in a urban area, with traffic present and trains, near, under or across a bridge, and near a body of water. The girls (who could have been playing in some sort of park) were taken and imprisoned in a hidden, deep place inside a structure. This place is dark, claustrophobic, wet, humid, dripping, with moisture, putrid, stale chemical smelling, and gaseous surroundings (perhaps vapors). It has tubular aspects, like drainage ducts where liquid flows There appears to be mechanical machinery associated with this structure (possibly a suction function). It could be some sort of sewer or drainage system.
There is a pyramidal structure related, possibly over the murder site.
The killer caused the victims to feel guilty and ashamed. He reprimanded them.
The killer seems to be a father figure.
There is data suggesting that the girls were molested, possibly raped.

Anomalous Data: The word "canyon"

Definitions:

Structure – In TRV language, a “structure” is defined as any man made construct. It does imply size or weight. A structure could be a road cone or a building.