We have released a new patch, build 1634, that fixes three discovered bugs:
[list]
[*] Missing Hiker event: The bug that prevented the player from giving First Aid to the missing hiker is now fixed.
[*] School Shooting mission: Sometimes the shooter would find an angle to fire through a closed door. This is now fixed, and all staff and students inside locked rooms are now safe.
[*] School Shooting mission: There was an issue with repositioning school staff inside a locked room which made the staff person move to the door instead of to the point ordered. This is now fixed.
[/list]
The School Shooting mission is perhaps the most challenging, and these last two fixes should improve your chance of success. Good luck, commander!