How do I delete photos in camera roll

Use iPhoto. Import your photos. When done you will promped to delete or keep. Choose delete.

Thanks for asking this question. The answers describing the use of Image Capture helped me enormously - I had 3000 to delete!

I use the iPhone file manager to manage files on my iPhone, it allows me to use “Ctrl”, “Shift” shortcuts to select multiple photos and delete them at a time.

Tried this. It didn't work.

Re Step 5: there is no Delete option.