Brian T. Downing v. Charlotte M. Perry

*476BLACKBURNE-RIGSBY, Associate Judge:

This case involves a high-conflict and prolonged child custody battle between parents, appellant Brian Downing and ap-pellee Charlotte Perry, over their two minor daughters, M.D. and E.D. The primary issue we address in this appeal is whether the trial court abused its discretion by concluding that a “substantial and material change in circumstances,” D.C.Code § 16 — 914(f)(1) (2012 RepL), warranted modification of the parties’ 2012 custody arrangement. The trial court’s child custody modification granted Perry’s request to remove Downing’s tie-breaking…