A Union funeral home is seeking donations to help defray burial costs shouldered by surviving relatives of a local family of four found dead Wednesday in what authorities have deemed a murder-suicide. Ruben Alarcon, 51, Andrea Alarcon, 42, and their two daughters, Scarlett, 9, and Emma, 6, were found deceased inside their home on Lincrest Terrace in Union around 10:30 a.m. Wednesday by members of the Union County Sheriff’s Department, the county prosecutor’s office announced Thursday. The two adults and both children had gunshot wounds, officials said. The murder weapon was located near Andrea…