Here is the 100% confirmed verified and corrected MS:
1) He used to have many slaves
2) He was killed by one of his slaves
3) They were accustomed to punish all the slaves who were living in the same house by death
4) A huge crowd of people
5) Do not kill so many innocent slaves!
6) He sought the most serious punishment for such a dreadful crime.
7) ‘It is not always good, senators, to follow traditions handed over by ancestors. Now, however what will happen if slaves are able to kill masters without punishment? Surely you do not believe this slave prepared his plan alone, without others? Surely the rest knew what this one wanted to do?’
With these words Cassius was trying to persuade the senators to punish all the slaves of [name], both wicked and loyal. Some were afraid that in this way, innocent slaves would pay unfair penalties. But Cassius had spoken so violently among the senators that no one dared to go against his opinion. The senators, therefore, with few resisting, sent out soldiers to kill all the slaves of [name].