WS has a RESOURCE SECTION right here, where you can find answers to lots of your questions. Take a look through the whole forum when you get a chance - there is a ton of information here! [ame="http://www.websleuths.com/forums/forumdisplay.php?f=180"]General Information & Discussion - Websleuths Crime Sleuthing Community[/ame]
One area where we get lots of questions and discussion revolves HRS dogs - what can they do? what do they hit on? how long must the deceased be in the same spot before the dogs will find the cadaver scent?
You can find answers right here: [ame="http://www.websleuths.com/forums/showthread.php?t=125709"]K9 SAR Questions & Answers - Ask the Pros! - Websleuths Crime Sleuthing Community[/ame]
This thread is located in the WS Resource Forum (told you there was lots of good info there )