descent profile looks like autopilot... probably just input a descent rate on the Mode Control Panel (MCP) or whatever its called in Airbusese.
The pilot/copilot is the primary suspect from the beginning.
How do we know this?
The names were not released in the first day.
Other Germanwings flights were cancelled by pilots refusing to fly (word gets around the pilot community quickly)
We have not heard from the families of the pilots because they are being interrogated by authorities, computers searched, etc. (under lockdown)
This indicates there MAY have even been a suicide note/manifesto left with the family/friends.
The manually locked cockpit door (to prevent code over-ride) indicates an intentional, deliberate hijacking of the flight.
Flightrader24 did analysis of the planes descent, info
here:
He set it to 96 feet, probably because 0000 couldn’t be set
Just a real tragedy