Right? Could Peus have sent it when he found out they captured pony tail? like as some sort of message to David "Abby took your girlfriend(Ms. Ruland / Samantha) , so I'm offering her boyfriend (Leo Bergen) up to you" I dunno, I'm grasping at straws here.
Rowan killed the ponytail bitch and kept her head and gave it to David cause he wanted to know details about her. He was sleeping with her and he kinda liked her after being with Elizabeth North.