Javier Soto made claims on Facebook page
Wladimir Sepúlveda spent nearly six months in a coma
President Michelle Bachelet backs measure
Michelle Bachelet defeated conservative rival in December
Group visited D.C., New York
Esteban Parada Armijo died in a Santiago hospital on Jan. 30
Country's president-elect supports measure
Alejandro Alfredo Bustamante Godoy stabbed in neck
Country’s Senate voted 28-6 to move measure out of committee
Socialist backs same-sex marriage, transgender rights bill