The Brief A 22-foot speedboat capsized near Liberty Island on Saturday night, leaving a mother and her 5-month-old daughter dead. Authorities have not yet determined the cause of the capsizing or whether the vessel was operating as an illegal charter. Mother and daughter deadWhat we know:The vessel overturned at approximately 10:25 p.m. Saturday near Liberty Island, sending all 14 people on board into the water, according to the U.S. Coast Guard and The Associated Press. Police then arrested the boat's operator, 46-year-old Manuel Hernandez of Manhattan, at 2:27 a.m. Sunday in the 72nd Precinct. Captain McCarthy stated that Coast Guard investigators are collaborating with the NYPD to examine the circumstances surrounding the incident.