A male nurse was sentenced Tuesday to life in prison for killing an elderly patient and attempting to murder four others at a Sendai clinic in 2000 by administering muscle relaxant.

Wrapping up 32 months of proceedings on the closely watched case, the Sendai District Court ruled that Daisuke Mori, 32, had intent to kill and was the only one capable of administrating the intravenous doses at the times of the crimes.

Mori immediately filed an appeal. He had pleaded not guilty, insisting the charges against him had been fabricated by police.