WEST NEWTON, Pa. (AP) — Authorities say a mother wearing a Cookie Monster costume apparently overdosed on heroin while sitting in her running car, shortly after she had dropped off her 9-year-old son at a babysitter’s home. 38-year-old Rachel Love Martin of Westmoreland County was charged Wednesday with child endangerment. Authorities say the babysitter called police to her West Newton home because she was concerned Martin may have been under the influence of drugs. Authorities say they are puzzled as to why Martin was wearing the Cookie Monster costume…but they are looking into it.