L's POV
I was walking towards Mr. Yagami's room. When I finally got there the first thing I did was knock. Relieving me of my worry, he answered which means he wasn't in Light's room. At first I thought I would tell him to leave this investigation and go home to his family, but then I thought, what if he found out Light told me and punished Light? I couldn't live like that. I couldn't have anyone hurting Light. I cared too much about him. So I decided to come up with another solution.
"I expect your son is Kira again," I said in monotone.
"What?! My son would never be Kira! I thought we already came to this conclusion!"
"Yes well, my conscience is telling me would shouldn't trust him," I replied, even though in reality I felt the opposite.
"So what are we going to do?" asked Mr. Yagami worriedly.
"You see, I've decided to place our handcuffs back on."
At this Mr. Yagami got very angry, but he knew that if he objected it would seem suspicious, so he didn't say anything for a while.
"Ok, but once he is not a suspect anymore will you remove the handcuffs?" he asked.
"Yes, of course," and since this was all I needed to say I left.