May Mabel Pantaleon be found safe and sound. The 31-year-old actress, whose credits include appearances on Dexter and Mystery ER, was reported missing on Sunday, the NYPD confirms to E! News. She was last seen at her family's Manhattan apartment at around 9 a.m., according to her mother, who told ABC News that her daughter has a history of manic-depressive disorder and had been taking medication—but a recent incident led her to believe Mabel had gone off her meds. "She was staying with me," Sylvia Pantaleon recalled. "She saw something on the Internet and got very upset, and she started saying a lot of weird things. She said, 'I'm leaving from here, all of you are...