According to this answer of yours, you can do the following inside your search.php:
if (isset($_GET['post_type']))
get_template_part('search', $_GET['post_type']);
else
// no post_type given
Then you have to set up the search-{post_type}.php files.
If you want to handle only some of the existing post types differently, do this by means of a switch:
$type = (isset($_GET['post_type'])) ? $_GET['post_type'] : '';
switch ($type) {
case 'attorney':
case 'criminal':
case 'musician':
get_template_part('search', $type);
break;
default:
// default search stuff
}