idk why but after saving Cassie i can't play more in that save file
You need to be very thorough to win.
Ask Sam and Lin Lin for the men's schedules
Ask Lin Lin to help you break in
Ask Arlene for help
Start the riot
Ask Arlene for help again after a day
Winning depends on stats as well. I've found the best option is to take down the front guards and attack the goons upfront.