native cs_set_hostage_foll(index, followedindex = 0);
Hostage entity index
New entity to follow
Sets hostage to follow an entity.
Hostages can theoretically follow any entity in the game, so the
followedindex does not have to be a client index.
This native does not work on Condition Zero, which has a different
hostage AI than other versions of Counter-Strike.
This function has no return value.
If the provided entity index is not a hostage, an
error will be thrown.