The computer that I had been using at work was taken by management. They 'said' there was pornography on it. After they held it for two weeks and 2 days I was dismissed and told that there was child porn on the computer. The people who seized it turned it over to the authorities. A professional hired by my attorney noted that Norton's Ghost Software was on the machine. I am concerend that the computer was tampered with during the time it was taken and turned over to the authorities.

Any thoughts on this?

I'm concerned that you are represented by counsel and are posting here, asking for more opinions. If you don't trust your attorney, find another.

Was everyone's computer seized or just yours?

At any rate - why would someone frame you in this manner?

Have you been charged with a crime or is your interest your employment (or loss of employment)?

Hopefully anything/everything loaded onto your computer is date stamped. I do know there are ways around that.

If it comes down to it it will be your word against the word of your accusers.

Norton's Ghost software is an automated system backup tool. It does not import child porn onto an employee's computer. Whether it could be used to spoof a date stamp on a data file in order to frame you is beyond me - but clearly that's not what it's designed to do.

The Ghost software is used in making an "image" or a snapshot of your hard drive and its data at a specicifc moment in time. Ghost (software) - Wikipedia, the free encyclopedia
They may have done that tp preserve a copy of the contents for evidence.

They would have to prove that you were at the controls as it were during the downloading of the images. Your counsel should have access to the evidence at some point for their defense.