If your case calls for a diagram of a floor plan or landscape or a crime scene diagram involving a landscape or floor plan or a timeline, SmartDraw is for you. It is inexpensive at $119.40 per year and easy to use with no artistic skills required. Naturally you could hire a litigation consultant to create these, but that could be expensive.
SmartDraw has a set of short video tutorials that you can watch to learn about what it will offer you.
For Creating the Floor Plan go here for the tutorial.
For Creating Landscape go here for the tutorial.
For Creating a Crime Scene Diagram go here for the tutorial.
For Creating a Timeline go here for the tutorial.