"I know this is probably a lot to take in. Would you mind coming back to the station to answer some questions for us?"

He touches the necklace under his shirt.

"There ... there has to be some sort of mistake. She would never hurt anyone like that!"

"Look, if there really is some sort of mistake somehow," (there isn't) "then your testimony will help us sort things out."

"...Okay."

He tells them everything. 

They ask to take his necklace for testing.

Sure! Maybe when it turns out to just be a normal necklace, it'll help prove her innocent!

They find traces of poison!

When they finally let him out of questioning, he goes to visit the secret twin sister that his girlfriend (ex-girlfriend? do you still call them an ex if they're dead?) apparently had.

"...Was she really..."

She doesn't, particularly, want to tell him that it was her he was "dating" this whole time.

How about she just doesn't say anything.

Eventually he leaves.

He throws himself into his studies. He's trying to switch to Law-track, and there's not much overlap with the art requirements. No one thinks much of it when he stops showing up to student events.

Someone asks him if he still wants to be a defense attorney, given that his client might just be killed anyways.

"...What? I mean ... sometimes people get murdered, yes?"

"No, haven't you heard -- there's this new serial killer who only kills criminals, somehow they managed to get someone to have a heart attack in jail, no one knows how they're doing it--"

He had not heard about that.

He stays up past dawn reading articles about the victims.

Time passes.

(He reads every article he can find about Mitsurugi Reiji. It's not a good habit, but - he's not going to stop.)

One of his professors suggests that he look into internships. He doesn't really know any attorneys, but he asks around and gets a list of names.

(There's an article published every day in the local paper about the latest victim of the heart-attack serial killer, and he reads them too.)

Most of the places he applies to don't want an art-student-turned-lawyer-in-training. He's just about given up when he's accepted for an internship with Hoshikage Law Offices.