Christchurch shooting

Let's go through this
I can watch the video , people in NZ cannot due to Nazi style censorship.
The video , however is a gift.
Amazing heroism , something I could never do . I don't think.
Especially the man in the wine red sweater .. pure heroism.
However , if you watch the video. You will see that there is no way he is acting alone. Physically impossible. It is a real video and this nut job killed at least 20 people .. 51 might be a stretch.
Though as he leaves the building there is a silver Toyota wills parked next to the door , 
He walks past the car , you cannot see anyone in the car.
He goes out the gate turns left and left into a lane where he has reversed his car into.
Picks up 20 litre? Red gasoline can. One of two.
Puts it down
Walks , trots back out to the street , stops.
Looks at the silver Toyota that's is starting to drive away , slowly, now with two people inside.
Walks quickly down the street to the other drive way entrance , there he shoots 3 people trying to escape over the back fence.
Absolutely, impossible unless he had help.
The fence and the position of his car makes it impossible to see or hear the three people , even if they were shouting " we are here come and get us " you would have great difficulty. Nigh impossible
Then if he did manage to hear..because of his extra sensory perception.
He walks past the main gate Where there is a traffic cone sitting on the road blocking people from leaving or entering.
He walks past the entrance , looks at the silver Toyota now with 2 people inside , driving away slowly.

Doesn't shoot .

But continues to the other gate where he shoots three other people climbing over the back fence.

The official government line is
A white supremacists walks into a mosque , acting alone , guns down 51 odd people .

I believe at the most fundamental level.

The government is lying.

The questions are:
Did the government know before
Which means someone is complicent  in murder?
Or was the government caught unaware. Only to realise they have to do what they are told. Naive.

My thoughts are toward the latter , naive.