My question involves labor and employment law for the state of: Indiana

I have had an external hard drive at my workstation for over a year. Yesterday, I took a half day of vacation, and powered down the hard drive, leaving the USB cable connected. When I came in this morning, one of my coworkers informed me that my hard drive had been taken by IT. I went to my manager who said that they wanted to search it for company information. I went to the IT manager, and he said that he and I would go through the files.

For whatever reason, this screams 4th amendment violation. This isn't the government, though. I don't have any company information on the drive, and I don't have any porn on there either.

Is there such a thing as employer theft? Do they have a right to confiscate my personal property at will and hold it? This just doesn't seem right at all.