"So what's the point?" Naoki Kamii asked, "Why is it said to be able to lock onto a region?"

"Because in normal tap water, it is impossible for Peridinium to reproduce abnormally like this."

Saito Hiroshi smiled and said, "I'm afraid the criminal wanted to use fresh plankton as bait for the goldfish, so he brought some lake water. But he didn't expect that the plankton he collected from the water was actually poisonous."

While Naoki Kamii was asking, Karasawa had already contacted Inspector Megure and informed him of the news.

"That's really good news."

Inspector Megure on the other end of the phone said excitedly, "This piece of information is very credible.

After investigating her online records, we found that Kotono Norikawa had visited a website for raising goldfish.

I'm afraid she saw the plankton farming method there and followed suit."

"If the place where the prisoners get water is near where they are imprisoned, then our search location will be locked down immediately!"

Tang Ze said, "Anyway, please send someone to search the north first. We will find the source of the water as soon as possible."

"I understand." Officer Megure nodded and said, "I'll arrange it right away."

"So what should we do next?" After hanging up the phone, Tang Ze looked at Saito Hiroshi and asked.

"It's simple. Investigate whether there has been any recent reports of red tide in northern waters."

Saito Hiroshi replied: "The occurrence of red tide in the sea or lake is a normal and unusual event.

It's normal because the cause is easily explained, but it's unusual because red tides can cause fish kills.

This will definitely be reported and popularized.”

"I will immediately contact the relevant departments to inquire." Naoki Kamii said immediately after hearing this.

"Leave the media to me. I'll have Sihuayuan mobilize their connections to help me contact them."

Tang Ze nodded and said, "This isn't a big deal, but it's an incident. To avoid causing a stir, the news reports will definitely include some scientific information."

After a brief division of labor, everyone started to get busy again.

And everything they did was to get closer to the hostages.

Until he is rescued!