BROOKLYN - Police say the boyfriend of a Sunset Park woman found dead earlier today has been arrested in her murder. Daniel Elias, 28, has been charged in the killing of 29-year-old Cynthia Lopez. Authorities say she was found inside her 50th Street apartment this morning. Cops say a relative called to say the couple was having a dispute and that her body was discovered when they arrived at the scene. Investigators say they believe she was strangled. A family friend tells News 12 Brooklyn that they were together for several years and had a 7-year-old child together.