In my patch 7 playthrough... I don't really know why but Halsin escaped without any help.
I get into the goblins camp and killed Gut... Then I went to the underdark and did something else for a while... After a few hours back to the goblins camp...
Gale has been arrested so I saw Halsin in his cage.
I escaped and regroup my companions, I killed Minthara and the hobgoblin... But when I entered the jail everyone but 1 goblin were dead and Halsin had escaped.
Back at the grove, he acted exactly like he usually do when I free him and talk with him... He thanks me, say that he'll help me with my tadpole (how could he know ?) and so on...
A bit wierd.
