Scenario: My friend John has a personality disorder, intensely paranoid for example.
Can I say:
There were three events last year that told me John had a problem.
or can I say:
There were threee events last year that told me John has a problem.
Scenario: My friend John has a personality disorder, intensely paranoid for example.
Can I say:
There were three events last year that told me John had a problem.
or can I say:
There were threee events last year that told me John has a problem.
Of the two alternatives, the correct one is There were three events last year that told me John had a problem. It should not be phrased with has because the verb told is in the past, so it must have told you about something in the past (i.e. John had a problem). It says nothing about whether the problem is or is not currently present.
I agree with mgkrebbs in the case of storytelling. In conversation, however, if I say:
There were three events last year that told me John had a problem.
I am implying that he had a problem last year but that the problem is no longer present. If I say:
There were three events last year that told me John has a problem.
I am implying that the problem existed last year and continues into the present.
Might I also suggest the following (assuming the problem still exists):
Three events last year told me John has a problem.