Maybe I'm completely wrong. But I think you should be treading a bit more carefully.
How do you think your daughter will feel when you try to have this guy (more than likely her boyfriend) arrested?
It could seriously damage your family in the future.
Afterall, if she wants a permanent relationship with him, when she's 28, he'll be 32. No-one would blink an eyelid.
I agree with abdulmajid, maybe you should have a word with this boy, ask him his intentions, does he know your daughters 14, would it be possible for the two of them to keep a platonic relationship until she is 16.
Your daughter will sleep with boyfriends whether she's 14 or 16, there is no way of stopping her.
Maybe you should be busy teaching your daughter about contrapception than shopping her boyfriend.