The only cause I'm aware of is the scenario presented in the opening post.
All the liberals not in the hospital (2 where in the free clinic) were either killed or caught in a siege on the homeless shelter (all my liberals were stationed in the homeless shelter).
When my two hospitalized liberals got out of the hospital come the end of the next month, they went back to their last location - the homeless shelter. Which was still under siege. I was not able to do anything over the ~two months that passed since the siege was initiated on the homeless shelter since all the liberals I could control were killed in that siege (I had no sleepers by the way. I think. If I did have a sleeper, it was a lawyer whom was a romantic interest of my founder (one of the two liberals hospitalized)). I was surprised seeing the siege still active after about two months. So, I tried to have my two liberals (the ones that just came back from the hospital) attempt an escape. The founder was shot to death. The other liberal was captured. He was sentenced to 11 years in prison. After 11 years of looking at the game count of time and telling me of the failed conservative attempts to re-educate my liberal, he was released and returned to the homeless shelter, which was still under siege.
See the correlation between the two encounters with the siege?
1. Both times all my active liberals were at the siege location.
- The first time, though, I had two liberals hospitalized and thus away from the siege, thus not ending the game yet.
- The second time, those two liberals were all I had - and they were both at the siege site.
2. Both times, all the liberals involved in the siege were killed or captured.
I hope this is clear. Do ask any questions you may have.
Edit: I just remembered. I did have a sleeper lawyer. I tried to use him to save my liberals from being judged guilty (which didn't work obviously. It's not easy to turn the court proceedings in your favor when you only have one sleeper lawyer).