AUGUSTA — Jurors cleared Alexander J. Biddle of a manslaughter charge in the Sept. 18, 2015, ATV crash in Sidney that killed 18-year-old Halee Cummings in the driveway to her father’s home. Biddle, now 23, of Pittston, did not testify during the three-day trial at the Capital Judicial Center, and his defense did not call witnesses of its own. The jury of seven women and five men began deliberations at 11:30 a.m.