1)
Why do they bring the episode of Uriyah, who was killed? This is the opposite of the episode with Michah!
1.
Rashi (from Sifri Beha'aloscha 88): The Tzadikim brought the episode of Michah. Resha'im brought the episode of Uriyah, to say that Yirmeyah should be killed, like Uriyah was.
2.
Malbim: The author of the Sefer teaches that the Zekenim's claim did not suffice to save Yirmeyah, for Uriyah prophesized similarly, and the king commanded to kill him!