In this paragraph is could used as past simple of can or it is used as conditional which mean roughly the same thing as "can"?
Jack :" But they both happened on the day of the festival, right...?"
Bob :"Just think about it, do you think people with a lot of enemies here in this village could participate easily in a local festival?
It would be especially hard for them to be around during the festival.
So they probably left the village intentionally around this time of year to travel don't you think?".