Stealthy Lines and Excessive Colour

I have a regular client in the form of a puzzle magazine in Italy, who commission me to illustrate a regular comic strip for them.  Detailing the adventures of one 'Inspector Varga', a homicide detective, the reader has to ascertain how the accused was implicated in the murder.  It's terribly exciting, and naturally I wouldn't dream of giving any clues away, so here's the un-speechbubbled versions for you to ponder over.  If you can work it out without the words then you're either in the wrong career, or already a detective.  Happy guess-working.