That's a different problem, and it requires a solution by itself.

> You let people evade fares and then those people go onto stab people like Zarutska.

That has nothing to do with it. The guy that committed that murder wasn't going to be deterred by a ticket fee. But it is interesting that you should right away jump from the one to the other, effectively using the poor dead girl for your agenda. Crime and homelessness are complex problems some parts of which are easy to solve and some of which are much harder.

You can't simply jump from 'someone got murdered on public transport' to 'public transport can't be free'.