how to write a crime novel

My first blog will be about how to write a crome novel. After two decades of reading crime novels, I am surely an expert and should be able to construct plots for a series of books. Unfortunately, current crime novels are mostly police procedurals and require a high amount of gumshoeing for research. Me, I am too lazy for that. So I will need to have private eyes, something like Magnum PI or Remington Steele, my favorite re-runs.
Since my reading staple has a high proportion of romance novels, the hunk factor is very important to me.
So let's see...
Two individuals perhaps? a male and a female lead.
Emily (last name to de decided): typist, self-effacing, low self-esteem
Archer Hamilton: PI, confident, talkative
Rest as we go along