The fruit cluster looks like Mahonia.
Where was it growing? Along a ditch, in a park or ? Sunny? Shaded?
A larger photo would be helpful.

I agree it does resemble the Mahonia aquifolium, or Oregon Grape.. but the leaves are not like holly leaves as you can see from the photo, they are smooth edged. Maybe this is a hybrid? I posted a larger picture, I hope it comes out bigger now.

Here is a link that might be useful:

Hmmmm, picture looks the same size. Doesn't matter.
I think the plant in question is Forestiera neomexicana. a.k.a.New Mexico privet/olive. Check out the link.

Here is a link that might be useful: Forestiera newmexicana