I was talking to a friend of mine the other day who has worked patrol for the past twenty years. As usual, the conversation eventually got around to my writing. He asked me if I still wrote about what writers do that really bugs cops on the street. When I said I did, he said, “Let me tell you one of the things that drives me crazy every time I see it on some cop drama or read it in some book. I hate it when they walk up to a door to talk to somebody or to check on a possible victim, and when they touch the door, it just swings open.”

I knew exactly what he was talking about. Every time I see that in a movie, I involuntarily roll my eyes. It’s like a subconscious twitch, and when it happens, I have to keep my thumb from automatically clicking the “off” button on the remote control.
Writers, hear me on this, please. In twenty years of police work, there was only one time that I pushed on a door and it squeaked open for me. And honestly, that was on a house check a neighbor had called in and when I contacted the owner to come home to check things out, we discovered that her husband just hadn’t pulled the door shut hard enough when he left that morning.

I have however had to climb through windows, bash open doors (granted they were hollow core doors) with my shoulder, crawled in through the doggy door, and rooted around in the yard until I found the secret hiding place for the key. Use your imagination. It is so cliché for your character to push on the door, throw an astonished look at their partner, and slip in an already open door. Have fun with it. Have your detective do something outlandish or even illegal. But get your character into the house any way other than through an unlocked front door.
If you do, my patrol friend will thank you from the very bottom of his heart.