Plot for Media

The protagonist walks out of a coffee shop by embankment tube station, as he places his cup on the table, he gets distracted, a passer by slips something in to his coffee. While he is walking along The Strand heading to charring cross police station, he starts to feel faint then blacks out on the floor just in front of the station.
 When he come too, he finds him self on the floor in an unknown apartment, The Windows are blacked out,  he gets up from where he is laying on the floor with a pounding headache, he try’s to remember how he got there but he has no recollection of the past few hours.
As he gets up he looks down to see his white shirt stained red in random patches, the only thing he can think the stain could be is blood, but it is not his own, who's could it be?
  He walks round the apartment he gets in to the kitchen, he sees a gun a envelope on the side of the counter, he picks up the gun knowing it is a Glock 9mm and checks the magazine to find it is empty. He opens the envelope and reads the note in side it says "Go to the bathroom, I told you, your mine!". as he walks down the hall, along it there are red arrows painted on the wall pointing towards the door at the end of it with a sign saying "Lets start!".
The protagonist goes up to the door, notices the door handle has been forced off, as he nudges it open he nearly slips on the blood that is on the white tile floor of the bathroom. There is a trail of blood that seems to be coming from the shower. As he gets closer he can see what seems to be a body through the frosted glass of the shower door.
When he pulls the door open the body flops out on to the floor in front of him, the head landing by his feet. a lifeless man, skinny, long haired, blood shot eyes, pale skin obviously a junky. He checks for a pulse nothing, but the corpse is still warm as if it is not long dead.
There is a letter attached to the man.The protagonist opens it and it simply just say's in big bold lettering "i've got ya"! There is a massive crash from the front door, it swings open, a group of armed police enter the apartment, they all look at the protagonist who is in the bath room at the other end, in a dazed look as if they all know him not as a criminal but as a friend?