Display different category template if custom field is checked

I achieved this recently with the following code in archive.php

add_action('genesis_loop', 'blah_search_results');
function blah_search_results() { 
 while (have_posts()) : the_post();
  if (is_category('in-the-news')) {
   // Get article URL
   $article_url = get_field('original_article_url');
   // rest of theme goes here
  }
 endwhile;
}