Correction

 What I seeWhat I think 
 4 footprints

a pool of blood

a blood spatter

the man is holding a gun in his right hand

there are two glasses on the table

the soles of his shoes do not correspond to the ones on the ground
the victim was not alone there was at least one other person in the room with him


he is holding the gun in his right hand but his head is turned to the right... he can't have shot himself


it looks like someone wanted us to believe he committed suicide.