No, it was Ashfur.
yes he loses a life when hawkfrost tries to kill him for his brohter to have power
He kills him by using a part of the fox trap that was supposed to kill Firestar
Ashfur was the cat who helped Hawkfrost try to kill Firestar in the last book in The New Prophecy Series, Sunset. In the fifth book in The Power of Three Series, Long Shadows, Ashfur reveals himself to Squirrelflight, Jayfeather, Hollyleaf, and Lionblaze as the one who attempted the murder. He was furious at Squirrelflight and wanted her to feel the pain of losing a loved one like he when she left him to be with Brambleclaw.
Haawkfrost died when Brambleclaw stabbed him in the stomach with a stick. This was when Hawkfrost trapped Firestar in a fox trap and was about to kill him when Brambleclaw stuck with loyalty and turned on Hawkfrost.
He and Brambleclaw were with Firestar, who was stuck in a fox trap, and Hawkfrost told Brambleclaw to tighten the trap and kill Firestar, but Brambleclaw killed Hawkfrost instead, fulfilling the prophecy "Before there is peace, blood will spill blood, and the lake will run red."
Brambleclaw kills his half-brother, Hawkfrost, in self-defense during a battle. Hawkfrost had betrayed ThunderClan and threatened Brambleclaw's life, forcing Brambleclaw to kill him to protect himself and his clanmates.
Well, there are a couple but I believe the 5 main ones are Hawkfrost, Brambleclaw, Leafpool, Squirrelflight, and Firestar. Hope this helped :)
Hawkfrost dies before Firestar, during the events of the final battle in "The Last Hope." Hawfrost is killed by Brambleclaw, who is later revealed to be his half-brother. Firestar dies in the same battle, succumbing to his injuries after defeating the Dark Forest warriors.
No on except the Erins know yet. Sorry... although we all already know that Firestar dies but it is unknown if Hawkfrost kills him.
He dies when Firestar gets stuck in a fox trap and he wants Brambleclaw to kill Firestar so he can be leader. Brambleclaw reacts to his leader instead. Next, Hawkfrost threatens to kill Brambleclaw. He thinks quickly and shakes up the pole from the fox trap. Letting this get tamperd, he grabs the sharp pole and right when Hawkfrost pounces, she nails it right into Hawkfrost's throat.
Hawkfrost becomes deputy of RiverClan after Mistyfoot goes missing.Hawkfrost is a blood and power thirtsy cat. He is the son of Tigerstar and Sasha(a rouge). He had a brother: Tadpole before his mother Sasha took him to riverClan. Tadpole dies when he was a kit from drowning. Hawkfrost has a sister named Mothwing who was a medicine cat and two half-siblings named Brambleclaw and tawnypelt.