Serial killer vs child

One scene I remember is the kid is in a shop of some kind and the killer is there following him. I think at one point one of them aims a toy gun at the other and fires a blank or something.

If that's not enough, another scene is where a cop/sheriff is searching the house of the killer, and soon as he heads towards the exit, he is struck in the head with an axe.

How old is the movie?

How old is the kid?

A total wild goose chase as I haven't seen the film in 30 years or something but axe killing, toys and kids somehow brings Silent Night, Deadly Night to mind.

EDIT: There's the axe murder of the police (timestamping doesn't seem to work so jump to 14:10 or so):

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movie probably 80's 90's?
12 or younger.

That looks like a good Christmas movie to watch, but that's not it. I didn't see, but maybe the killer is after a kid because he is a witness to one of his murders, as far as I know he didn't go after any other kids.

Death Valley (1982)