A to Z Challenge - D is for Desk

The A to Z challenge is to write a daily blog post centred around a different letter of the alphabet each day. I will attempt to write a complete story which will continue each day and hopefully draw to a conclusion when we get to Z.
Are the box and the finger somehow related to Mr Summers’ job as the head of a research lab?
For previous posts click a letter - A, Band C


DI McDonald closed the office door behind him as he put on his latex gloves. The girl was frightened enough without letting he...