Retrieve an item from Backbone with ID in URL (independent of collection / model)

Question

I am looking to retrieve a specific piece of data from Backbone (I'm using the localStorage adapter, not a server). I can see the ID of the items by looking at inspector.

I want a way to click on any item in any view, regardless of the collection it is in, or if it's it's own model, or whatever, and pass it to a details template.

So, <span onclick="router.navigate('details/:id', {trigger: true});">Single Page</span> would be attached in certain places throughout the app. All items would create the URL with their own ID.

Is it possible to agnostically render a template with the data from that single model?

My router:

    assetDetail: function () {

        var assetId = router.current().params[0];

        var assetModel = new app.Models.Show({
            id: assetId
        });

        var assetDetailView = new app.Views.assetDetail({
            model: assetModel
        });

    },

However, when I put console.log( this.model ); in my detail page's render function the data is in the right format, but everything is null (the model defaults).

Thank you for any help.

Update:

As long as I know the exact collection, I can do the following. I'm currently rewriting my app to be like this. However, it still would be great to know if you can do it without knowing the collection (just having the ID)

        var assetId = router.current().params[0];

        var collection = new app.Collections.Collection({});
        collection.fetch();

        var themodel = collection.get(assetId);

        var assetDetailView = new app.Views.assetDetail({
            model: themodel
        });