He has Harry's soul why? Harry got kidnapped, murdered and used as a soul shield by Johnny. I doubt god would be cool with him burning in hell for being a genuine victim.

he says that when Harry walks past the church too
you must do what you think I right of coarse

Why the hell didn't the cops arrest the creepy figure in black sitting outside the room?

Watch to the very end. Lucifer says both their names, implying he has both souls.

If he was truly innocent, I'd imagine he went to Heaven.
I'd say this cloud is Cumulo Nimbus.
Didn't he discover America?
Penfold, shush.

What happened to Harold Angel's (not Johnny Favorite's) soul? Any suggestions?

He realized he couldn't escape and knew that not only did he kill all those other people, but his daughter as well. In the end, when he responds to the cop saying he is going to burn for what he did he goes, "Yeah, in hell." meaning that he knows he is going there.

And what if lucifer took control of epiphany's kid to kill her. Killed by her own child. That would explain the glowing eyes and pointing fingers at the hand.

But in the case of Epiphany's murder it seems Cypher did the killing himself - he collects Harry's (?) gun before leaving Margaret's apartment and is curiously waiting, clean shaven and in a black dress, outside the hotel room. Also, there was no typical hallucination sequence to denote Harry was in murder-mode. I think Cypher did it.

It was that he did the killing but Cyphere was able to make him not remember what he did, which is why when he goes back he sees the dead bodies and reacts with shock because he didn't know they were killed.

I recall that scene too, and always wondered about it.
Louis Cyphre tells him that he killed everyoneaided by Louis. What does aided mean exactly, is what I want to know.
Was he possessed?!
If so, he is not responsible! If Louis means he made it so Johnny/Harold could escape undetected that is another story.
Maybe someone else could shed some light on this?
"I'd say this cloud is Cumulo Nimbus."
"Didn't he discover America?"
"Penfold, shush."

I think Cyphre killed Epiphany himself. We see him picking up a gun right before he vanishes from Margaret's apartment. Harry notices he's gone, and then heads back as fast as he can. Cyphre is sitting outside when he returns.

I think he kind of 'had to'. He wanted to see for himself, as his mind was balking (naturally) at what was really happening.
Another reason is he likely knew there was no escape at last. Note how he looks utterly lost & weeps, and never even denies a thing to the cops that are there.
Its over, and he knows it.
"I'd say this cloud is Cumulo Nimbus."
"Didn't he discover America?"
"Penfold, shush."