THE HORSE WAS PREGNANT and like i think the girl was already strangled to death when he found her. and the guy was like... a total wackjob but kinda in love with her i think? and he sewed the bird into where her heart was so that it'd beat again. then he sewed her into a horse that was pregnant so she could be reborn
but he didnt murder her. it was the wackjob guy's social worker who was trying to frame him