Three teenagers suspected of taking part in a brazen gang rape at a Brooklyn playground were taken into police custody on Sunday, a law enforcement official said. The attack on Thursday night, in which the police said five young men with a gun separated a father from his 18-year-old daughter and then took turns raping the woman, set off waves of anger and uncertainty in the Brownsville neighborhood where it happened. Elected officials also questioned whether the police notified the public quickly enough after the attack, a suggestion the Police Department strongly contested on Sunday night. Two teenagers, a 14-year-old...