Chased Him

I saw someone in a vehicle throw beer bottles in my yard so I quickly got into my car and chased them down to get the license number.
I got the number but now I'm told I could be in trouble for chasing them down.
This sounds weird to me since that was the only way I could identify the vehicle that is probably the one trashing yards on our street.

Can I get into legal trouble chasing someone like that?

It is not illegal to follow them and get the info. You cannot endanger the vehicles etc. of course.

If that's the case then just what defines a chase?
There was one person in that vehicle and just me in my vehicle.
No speeds over the limit and got the plate number in less than a mile.
There was enough traffic to slow the guy down.
Is it terminology or just what is a "CHASE" in the eyes of the law?
What could I be charged with?

If you endanger or threaten, that can be illegal. Following and noting the license plate is 100% not illegal.

New Development:
A Deputy Sheriff came to the house today and questioned me about the chase incident and I told him I did chase the guy to get his plate number but it wasn't a chase like a movie scene or threatening anybody. So, maybe my choice of words is incorrect and should have said followed.
Anyway, here is my question:
I wasn't read any rights and was just talking to the guy straight-up and problems around here.
Since i wasn't read my rights I think that terminology shouldn't be held against me in a court if it comes to that. Apparently the guy I followed made a complaint. I don't really know.
So, since I used the word "CHASE" is that an admission of guilt?
Can that be used against me in court if it comes to that?

Just say you followed him to get the plate and nobody was put in danger. You do have a right to identify who it was. No prosecutor can prosecute for that.

Dismissed.
No witnesses and I did what was suggested above.

Congratulations!