WP Taxonomy Filter

<?php
	$params = array('post_type' => 'garimpeiros', 'paged' => $paged);
	if (isset($wp_query->query_vars['estado']) && '' != $wp_query->query_vars['estado'] ) : 
		$params['tax_query'] = array(
        	array(
	        'taxonomy' => 'estado',
		    'field' => 'slug',
	        'terms' => array($wp_query->query_vars['estado']),
            )
        );
	endif;
	$garimpeiras = new WP_Query($params);
	?>
<ul>
	<?php if ( $garimpeiras->have_posts() ) : while ( $garimpeiras->have_posts() ) : $garimpeiras->the_post(); ?>
		<li><?php the_title(); ?></li>
	<?php endwhile; else: ?>
	    <li><?php _e('Sorry, no posts matched your criteria.'); ?></li>
	<?php endif; ?>
</ul>

Hi Leocaseiro,
This gist return all post with the custom taxonomy "garimpeiros" right?

No, the taxonomy is estado and the custom post is garimpeiros!