The BTK Killer linked by a computer diskette?

From: Tony (anthonypetito_at_gmail.com)
Date: 06/27/05 

Date: 27 Jun 2005 09:17:18 -0700

Just curious as I was asked this question by a fellow co-worker. The
rueters story floating around today regarding the BTK killer says that
he was captured by a computer diskette (I assume a 3.5 floppy) sent to
a local newspaper. This computer diskette was said to be linked to a
computer in his church.

My question is.. How is this possible? Does the CPU save machine
specific information on a diskette when saving to or formatting?