Now, you may know Dr.L. The guy whos room is covered with goo yeah him, well I think that it is time to talk about him and what you think hes hiding. But what I think is he was a once a victim of that he survived 's pocket dimension. But he escaped some how, he is lost in the facility or anywhere. hope you write down what you think Dr.L is.

Well my theory is Dr.L is the guy you see when you are experiencing SCP-008 infection.
If you noticed, when you are heading towards the body in the SCP-008 death scene, the scientist or doctor looked like he's in a bad shape so maybe a he is Dr.L. Well,he sounded pretty tired and he shouldn't sound tired because he sat down long ago. He can't even get up! So maybe he escaped the pocket dimension and took a rest ( because the pocket dimension makes you tired easily) but then he sees you coming to kill him. He tries to get up but he was too tired.

That's my theory