There are 2 survivors from this attack. What is their story?
Apparently the 2 survivors were in the basement, either sleeping or unable to get out with the door blocked.
It’s possible to kill 4 people in total silence with a knife. It’s happened before. A gun may be used to intimidate but not be fired. The killer holds one person hostage with a gun or a knife at his/her throat, ordering a 2nd to tie up and gag the other 2.
Then the killer holds the knife to one of the bound prisoners, and orders the 3rd to tie up the 4th. The last unbound prisoner, the weakest and least threatening, is tied up by the killer.
All the while he’s promising it’s just a robbery, they will be able to get unbound after he leaves, just be quiet...
Once they are tied up slightly, he can tie them up very securely, and ensure their gags are effective.
Then he is free to torture and knife them one at a time, to increase the terror of the others.
It’s a work of pure evil. I hope the police find him or them very fast. It’s not a one-off crime.