Blogger blogs get spidered quicker, but don't get ranked any higher.
There are some SEO things you could do
but although I'm not an expert,I feel you have missed the purpose and the power of the blog, which is the personal interaction and what you really need is to start actually interacting with other relevant blogs.
Using blogging methods such as trackback, comments, blogrolling, submitting your feeds, reading and reacting promptly to others' feeds...being a little contentious, or amusing, or personal. Getting some multi way conversations going or at least sticking your nose in others' well attended conversations.
If there arent many detective blogs about, find relevance in non PI blogs or add a personal, amusing (or even say a photoblogging) level to your own. . Enjoy yourself and forget about google, then watch the hits roll in..
(thats the theory anyway, one day i'll try it myself)