Yes and no, there are certain crime that definitly deserve death penalty but, the thing about crime is that, sometime innocent people goes to prison, due to stupid jury and stupid cops, in addition sometime, there are cases of police misusing their power, with the exception of federal police agencies such as FBI, most local police department, the the government does not exactly set the standard of having to become a police officer, to be very high, this make it easier for those who are not very good people to become cops, as a result, we see more cases of police brutality or police incompetence within local police forces. I am not sure why this is the case in western country, growing up in Asia, at Asia, the criteria to become a police officer within the local police force is hold to the same standard as federal police force, as a result, police brutality and innocent people going to jail due to police incompetence very rarely happens.
Yes, I think we need to make the the law more strict in regards to killing cops, but before that, we need to find a way to upgrade the standard of local police force, to be of the same level as Federal Police force.
(I know in Taiwan and Japan, other then military high school, there are also police high school, for year 10~12, most graduate would later move on to study policing related degrees in university and join the police force, after graduating, which might be one of the reason, police brutality is much rarer in East Asia, then the west, western cops usually only have 1 year policing training and due to only having 1 year training, they only take people who are already very fit, but just because somebody is fit, don't mean they are ethical or smart. East Asia because it is 3 years of police high school training, it mean they got the time to build everybody's fitness level up from the scratch, so even if u are a total nerd, u would be fit enough by the time u graduate, federal police agencies such as FBI, usually recruit people who are already cops and then provide them with further training to make them even better cops)