system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Death penalty is sometimes necessary

Context: 

In Brazil, there is a serial killer called Lázaro who’s been killing people since 2007. He went to prison three times and escaped every single one (if I’m not mistaken, the last one he was free to go out for the holiday, but didn’t comeback. How unfortunate, huh?). Recently he killed a whole family in Brasília, he’s currently a fugitive and the police is looking for him across the country.

There is no death penalty in Brazil and I’m very convinced that this “extreme” measure would end with all the panic it’s been going on in the last weeks here. Mainly as “death penalty” I refer to the police having the rights to kill this dude as soon as they find him.

Probably some would argue that “everyone deserves a second chance”, or (that’s very popular actually) “he is a society’s victim” or “let’s rehabilitate instead of punishing”; but, seriously, the authorities even lost the count of the amount of crimes this guy has made, and the sentence for him is summed up to 300 years.

Lázaro should’ve already be dead. He’s a psychopath and kills random people with no remorse.

—

This was just an example to illustrate my point of what the lack of this penalty can cause. Brazilian goverment yet hasn’t applied the penalty and that’s very upsetting.

Try to convince me that death penalty is not necessary or justified. CMV.

Edit: Sorry for not specifying earlier. Given the situation, I’m specifically talking about the penalty in Brazil, so please have in mind the country’s situation.

Edit 2: Personally I’m very happy to see the community debating this issue in a healthy / civilized way. Cheers to everyone! :)

Edit 3: Added some info.
gpt
I don't think you mentioned this argument but (not in the case of Lázaro it seems) but if we speak in general terms then there is the chance that the evidence available would lead to the wrong perpetrator. If that person has already been executed, that's not a sentence that can be reversed if and when new evidence is found to exonerate someone.