A couple of things. Sometimes kids with tempers need some help identifying what is going on. There are lots of books at the library for kids that use language and pictures that help kids understand how they are feeling. My son's described when they felt like they were getting angry as feeling like a storm cloud was blowing in for a long time. It helps them to see it in themselves. Once they have the language to use when they are mad, the next thing to do is give them appropriate ways of expressing it. You can play act (he won't know)---- something that makes you mad and what the appropriate response would be. The idea would be to get him to use his words, take long,deep, slow breaths, count to 10, give himself a hug (that squeeze is calming), have a peace spot to go to calm down by himself.
It also helps to look for triggers. Work with that because that might tell you if there is something in particular you should address with him. Maybe his older brother is teasing him. Maybe he is having trouble learning the letters and is frustrated by it so he starts to amp up the level as he is doing it. Etc. As you see him getting upset (try to reach it before it hits max level)---- say you look upset. What can we do to calm down---- use our words, go cool off alone, count, etc.
Lastly, I'd stay really consistent with things. If he throws a matchbox---- bye bye matchbox for the day. If he has a temper tantrum, don't try to reason with him during. He calms down first or it will just make it worse.
Good luck, four is a tough age for sure!!
Sounds tough. My son has talked about killing others, he's five and yes it is distressing. I think kids do this b/c they don't really understand the seriousness of what they are saying. They probably heard someone else say it.
It might not hurt to get an evaluation done..
My son talked about the killing a lot a few mos. ago, but it has died down. He would say something about shooting people, etc. I felt terrible b/c I don't talk like this and we don't watch violent movies.
I find spanking only inflames my son and makes things worse. I know a lot of people say to do it, easier for those w/out kids to say it! Also, in a recent book a thing called time aways were mentioned (not time outs). You put the child in a room and shut the door and let them get their temper out in there alone and learn to deal with their own temper and calm down. When they calm down, they can come back out. If they try to come out, you go and shut the door again.
Just a few thoughts....