u/gracieeunhahn reminds my that Deb has explained that the substance in the vials are highly addictive and dangerous. That would explain the intruder's frantic search for the safe. If he hadn't used the substance before, he would've probably have search more carefully through drawers and the other area he looked through.

u/sierrasubject4 also reminds me that they find out the name of the chemical is "life's blood". I am still re-watching videos and have not gotten to that part, thanks for the reminder. However, I was not clear enough so I do apologize. I meant to ask the chemical composition of the substance. Was curious to know what it's made of, and if there is anything similar to it, or if the chemical actually has some real use to it.

Either way, I am still re-watching and have much to remember, but I am still thankful for the responses.