Dean hadn't seen Sam for days and quite frankly he was a little worried about his brother. It wasn't like Sam to disappear on his brother like this. Dean had pulled over to the side of the road and was calling Ellen, asking her if she'd heard from Sam. When his call waiting beeps he looked down and saw Sammy's name on the phone. His brother was babbling shit in his ear, shit he really didn't understand. "Where are you Sam?" Dean asked him. "Stay put, I'll be right there."
Dean had always had feelings for his brother, feelings he knew one shouldn't have about their siblings. Sammy had been his world ever since his dad put him in his arms and told him to run all those years ago. So, it was natural for Dean to feel this way except he really didn't think it was. Dean had his share of flings over the years with a lot of different women but nothing really made him forget about Sammy, and definitely not anyone.
Sam was sitting on the bed when Dean finally got there and was knocking on the door. Sam couldn't make himself get up to answer it. Dean opened the door after knocking a couple times and walked in looking at his younger brother. He looked down at the others hands and sees blood on them, "Sammy are you hurt?" He asks him with concern clearly written all over his face. Dean walked over to him then, noticing all the blood on Sammy's shirt. "Sam, oh fuck Sam." Dean says. "It's not my blood" Sam says to him." "Where have you been, Sammy?" Dean asked him, looking down at his hands, seeing the blood on them. "I don't know, Dean." Sam says, obviously shaken up. "Sam, you've been missing for 6 days. I had no idea where you were." Dean says brokenly to his brother. "I don't know where I've been either." Sam says. "Okay well, we'll just back track and see what we can come up with. What's the last thing you can remember?" He asked him. "That hotel room in Texas 6 days ago," Sam says. "That's the last thing you remember?" Dean asked him. "Yep that's it." Sam replied.
Dean walked over the window and looked outside and notices blood on the window sill. "Sammy, come here." Dean says to his brother. "Blood," Sam says. They walk outside and are walking around when they get to storage spaces and Sam tells Dean to try that one. Dean looks at him. "It's just a feeling I have." Sam says. Dean walks over to it and looks at the lock and Sam feels in his pocket and finds the key. "Dean here," Sam says. Dean takes the key and unlocks the storage unit and there's an ugly car in here. "Really you stole this piece of shit?" Dean asks Sam. "I don't, uh, I don't know." Sam offered. Dean opens the car and they look inside, Sam takes searching the front seats while Dean looks in the back. "Sam look," Dean says holding up a bloody knife. Sam's face is a mixture of shock and disgust. Did he kill someone with that knife he's wondering? Has he become the monster his dad told Dean he might have to kill? Sam finds a receipt in the front seat to a nearby liquor store.
They get into the Impala and drive a couple towns over. Dean pulls up the liquor store and looks at the receipt, vodka and cigarettes, really Sam? The brothers get out and walk into the liquor store, the clerk is clearly freaked out by Sam and tells him to get out before he calls the cops. Dean tells Sam to go wait in the car but he argues and Dean has to tell him more forcibly for him to go get in the damn car. Sam walks outside and Dean asks the clerk what happened. He says Sam came in drunk and went and started drinking a 40 oz. and stole some cigarettes. The clerk doesn't tell Dean anything so Dean pays the man and finds out Sam drove north.
Dean points the car in the direction that Sam went in yesterday. "So what the hell is going on with you Sam? Drinking, smoking, throwing bottles at people, that sounds like me more then you." Dean starts. Sam just looks at him. "Wait, turn down this road." Sam says, Dean looks over at him with a confused look." I don't know, I just have a feeling." Dean turns down the road and they pull up to a house and Sam quickly gets out, leaving Dean to follow after him. "You think we should knock?" Dean asks. "Yeah sure," Sam says, walking around and seeing an alarm system that's been cut. Dean walks over the window which is broken. "You'd think this place would have an alarm." Sam mentioned. "Yeah you'd think so." Dean replies. They go in the house and it's completely destroyed. Papers everywhere, books all over the place, broken dishes, and unmistakable blood. Dean walks into the back room and a man is on the floor. He pokes at him to see if he's dead and when he couldn't tell turns him over and sees his neck is slit. "I did this." Sam says, quietly. "Well let's see if you did or not." Dean says looking up at the security camera. Dean can't believe his brother would do something like this. They go through the security footage and watch Sam beat the shit out of the man before slicing his throat with a knife. Dean still can't believe it was Sammy, not his Sammy, he couldn't do this. His brother is sitting there in shock after the video plays and Dean is trying to clean up and cover their tracks. "I did that, I broke in and killed a man in cold blood." Sam repeats emptily. "I'm sure you had a reason." Dean says. They get out of there and head back to the motel.