@Demonic Angel Alex has pretty much already noticed, but with the way he is changing it's sorta like Rick on the Walking Dead during his Rickmocracy phase. Except Alex only wants to protect Sadie and Micky. Say someone more recent in his past showed up. He wouldn't care if the person got ripped to shreds in front of him as long as his family is safe. He already did something between the start of the outbreak and now that is pretty horrible. He always had some strange demons in his head and seeing Ollie die in front of him broke them fully free.