i'm donnie wahlberg. thanks for watching. good night she was chosen. >> since she lived down the street from me. i could watch the coming and going quite easily snuck into the house. she wasn't there. i went back to one of the bedrooms and hid. >> welcome to very scary people. donnie wahlberg after torturing and killing seven people, demented serial killer btk contacted police to boast about his brutal acts. he threatened more victims would follow. his real identity was still a complete mystery. he dared cops to find him. the city of wichita was on edge. wichita police form a secret task force of seasoned detectives to track down btk. they need to capture him before he kills again. here is part two of btk, the taunting. >> wichita, kansas was in the middle of america, and nobody locked their doors. was a great little town to be from the morning of january 15th, 1974 was just a regular school day in the otero household until the unthinkable happens. >> an intruder enters their home and commits atrocities against this innocent

i'm donnie wahlberg, thanks for watching

i'm donnie wahlberg. when robert durst's wife, kathie vanished without a trace, her family suspected foul play. but there was no proof of a crime. no body was ever found. 18 years later, when prosecutors opened a new investigation into her case, durst himself disappeared. he fled to galveston, texas, and began a strange new life. a new name, a new story, a whole new identity. he was posing as a deaf mute woman named dorothy signer until a dead body was discovered floating in the bay nearby, and a trail of blood led right back to his door. it all seemed too bizarre, but durst would explain everything in detail. here's part two of robert durst. nobody tells the whole truth. >> good afternoon. in the news today, a reward of $100,000 offered by a husband to help find his missing wife. >> robert durst's wife, kathie durst, went missing in 1982. >> the wife, 29 year old kathleen durst, a medical student at albert einstein college, disappeared from the couple's manhattan apartment. >> once i heard she disappeare

i'm donnie wahlberg. at the end of the 1960s, a series of murders in northern california in different towns using different weapons would turn out to be the work of one man. but police didn't connect the crimes until the killer did it for them. not satisfied with just getting away with murder, he bragged to newspaper reporters and taunted investigators. what would inspire someone to conjure up such a twisted plot? stalking innocent people and killing them for sport? his reign of terror would go on for years, and he would live in infamy, naming himself the zodiac he taunted police with letters and terrorized the people they protect. more than three decades later, a famous serial killer case goes unsolved the first set of murders took place near christmas. >> benicia is about an hour away from san francisco. >> benicia was a very quiet community. benicia never had the crime rate that san francisco had on december 20th, 1968, david faraday came to betty lou jensen's house to pick her up for their first date,

i'm donnie wahlberg. the serial killer known as btk began terrorizing the city of wichita, kansas, in 1974, stalking and savagely killing his victims in their homes, then taunting police and reporters with disturbing letters detailing the carnage. demented. elusive. btk was actually hiding in plain sight, but his true identity and motive would remain a mystery for decades. it all began on an ordinary day with the otero family. this is part one of btk bind, torture, kill. >> i came through the back door, cut the phone lines, waited at the back door, had reservations about even going in or just walking away. but pretty soon the door opened and i was in. >> the otero family was a family of seven headed by father joseph and his wife julie. they had both been born in puerto rico, but they moved to new york as children and there they met in high school. >> my family was your typical military family. my father was an air force sergeant, and my mom was a stay at home mother. good catholic woman. >> they had five

i'm donnie wahlberg, thanks for watching ello and welcome to our viewers in the united states and all around the world. >> i'm ben hunt in london. it is so good to have you with me. coming up on cnn newsroom. america's top diplomat addresses. what's next for syria after the collapse of the assad regime and what role the us could play? we'll have analysis on the latest developments in the region. downtown san francisco experiences its first tornado warning in recorded history. details on the unprecedented storm, plus questions and unease, are only growing after those mysterious drone sightings along the northeastern u.s. us secretary of state antony blinken says the u.s. has been in direct contact with the lead group of syrian rebels. washington has designated that group a terrorist organization. the news came after saturday's diplomatic meeting in jordan to discuss syria's future. representatives from the u.s. middle east and europe as well were at that meeting. afterwards, blinken said the contact with the group was an effort to locate missing journalist austin tice and explain what'

. >> i'm donnie wahlberg, the zodiac killer is terrorizing northern california, and all of america is holding their breath, waiting for a break in the case. but while police desperately try to identify a suspect, the killer has a new plan, one that will spread panic and make him infamous to him. murder has become a game, but this game is not over. not even close. we continue with i am the zodiac he stalked and killed with knives and guns. >> once he even dressed as an executioner. the man called himself the zodiac. >> the first canonical murders of the zodiac happened december 20th, 1968. it was on lake herman road in solano county, california. a young couple went on a date. the killer forced the victims out of the vehicle. david faraday was shot in the head once, and betty lou jensen was shot in the back five times as she was trying to run away the boy was an eagle scout. >> there's no record of any misbehavior on either one of them. >> if you were at that scene and saw the waste of life and these young kids turn your stomach six and a half months later, the killer returned and targe