There is a reason that people today are more concerned about law enforcement violence than ever before. Law enforcement knows that if they hurt members f the public, there is another law enforcement official right behind them to help them cover it up. With no accountability, law enforcement just does whatever they want to. The abuse is troubling.
I don't think law enforcement officials are more or less violent than they were in the past, we just get to know more about such incidences these days. The officials in questions need to be investigated and they should lose their jobs. Even if the homeless vet committed a crime, they didn't need to beat him and put him in a coma.
Law enforcement officials are no more violent today than they were in the past. Studies have backed this up. Today, it is more widely reported due to the advent of social media and other technologies that shows vivid pictures and accounts of the violence. However, this also serves as a deterrent.
I don't think that law enforcement officers are becoming more violent. I think that it seems like they are becoming more violent because there is much more news coverage nowadays, so more police brutality and similar stories appear in the news. Police brutality has also been a hot topic over the last few years, so police brutality-related stories may receive more exposure than they did in the past. As a whole, we are becoming more concerned as a society about the rights well-being of convicted or suspected criminals, so we pay more attention to these stories now than we did in the past.