I could definitely see him playing the part of Aberforth....he has that dark mischievous look but also has a caring smile under it all...another great casting!!!!

PS....Sabior is one of the snatchers that caught Harry, Hermoine, and Ron when they said Voldemort.

Here's what it says at wikipedia for more information about him...

Scabior is a Snatcher in the gang led by Fenrir Greyback during the height of the Second Wizarding War. Given his association with and deference to Greyback, it is possible that Scabior is a werewolf

He was among the group that captured Harry Potter, Hermione Granger, and Ron Weasley in the spring of 1998. On Greyback's orders, Scabior checked the list of truants, searched the prisoners' tent for Harry's glasses, read a cutting from the Daily Prophet, and expressed terrified awe at the thought of summoning Lord Voldemort. He was also the only member of the group not to jeer when Greyback expressed a desire to bite Hermione, instead encouraging his leader to restrain himself. Scabior's last known act was at Malfoy Manor, when he drew his wand on Bellatrix Lestrange, lost a very brief duel, and fled with the other Snatchers.

It is possible that he was present at the Battle of Hogwarts as his superior, Fenrir Greyback, was also present.