I think Interpol might be a poor choice to report his crimes to, since I suspect they're focused on much larger targets.
You can't report anything to Interpol directly, you report it to your local or national police.
If they investigate and find a basis for an arrest but can't find the suspect, they go to their National Central Bureau. They contact relevant other national police forces if they think they know where he may be, or issue a worldwide Red Notice arrest warrant via Interpol if they don't.
Good luck, I think you'll need it.