(Newser) – No clarity, but more potential threads to follow in the case of Lori Vallow, the Idaho mother arrested in Hawaii last week in connection with the disappearance of her two children. The first thread comes via the ex-husband of Vallow's niece, who filed paperwork in an Arizona court last week in connection with his own child custody battle. In his filing, Brandon Boudreaux alleges ex-wife Melani Boudreaux knows the whereabouts of JJ Vallow, 7, and Tylee Ryan, 17, but has an "unwillingness to cooperate with law enforcement in finding those children" that Brandon finds "daunting," reports CBS 5. Melani’s "current husband has told law enforcement something to the effect that [Melani] says sometimes children are full of light and they just like that they go dark," reads his filing, which also alleges Melani is part of a cult.