Callum Logan Callum Logan , a criminal drug dealer , was the biological father of Kylie Platt ' s son Max Turner . The pair shared a brief relationship in 2006 before and after Max ' s birth , but Kylie lost contact when Callum was imprisoned . When he came back into her life eight years later , he attempted to get custody of Max using both legal and underhand methods to do so . His reign of terror against the Platt family ended when Kylie killed him as he was attacking Sarah Platt . Nearly six months after his death , Sarah gave birth to his son , Harry Platt . Biography . Callum and Kylie grew up on the Eccleston Estate and started a relationship around 2005 . When Kylie became pregnant with their son Max , she was kicked out by her father Brian resulting in her reliance on Callum . However he became a little less supportive as the pregnancy progressed , but returned to Kylie when Max was born . Callum later ended up in prison after assaulting a judge , and lost contact with his partner and child . After Kylie married David Platt ( who would become a father figure to Max ) she didn ' t speak about her past . However in 2014 , she opened up about Callum when Max was suspected of having ADHD and the possibility of it being a hereditary illness . When asked what became of Callum after he was sent to prison , Kylie was uncertain and unsure whether he would have behaved himself inside . Feeling the stress of family life , Kylie headed back to her old haunt - The Dog & Gun - and met Callum for the first time in eight years . She looked to score speed from him , which he happily supplied and hoped to woo her back to her old life , trying to convince her that family life and being married to David was not exciting enough for her . However Kylie only wanted Callum to give her drugs and nothing more . Callum started to integrate himself into Max ' s life and on Christmas Day , he turned up at No . 8 while the rest of the Platt family were celebrating David ' s birthday at Just Nick ' s , bringing a bike for his son . David returned home unannounced and was shocked to find that not only that he was Kylie ' s dealer , but Max ' s biological father . The pair got into a scuffle , and Callum left when the rest of the family returned . Angry with Kylie for lying to him , David kicked her out of the house and she was picked up by Callum . In the new year , Callum was confronted by a worried David asking where Kylie was , however he denied all knowledge of her whereabouts . Believing that he was lying , David and a reluctant Eva Price broke into Callum ' s flat to search for Kylie , but found he was telling the truth . Callum warned David off and he tried to get back at him by reporting his drug dealing , but Callum was one step ahead and cleared his flat of any sign of drugs paraphernalia before the police arrived . Callum began turning up more frequently , bothering David and wanting to see Max . He soon got acquainted with Katy Armstrong and they started dating , despite David warning her that Callum was a drug dealer . Callum later revealed to Max that he was his real dad , which caused the boy to rebel against David and wanted to know more about his real father . David eventually gave in and told Callum that he would be able to see Max . Callum broke up with Katy after mocking her for her lack of ambition after she revealed to him she wanted to remain in Weatherfield with him rather than leave for a new life in Portugal with her mother Linda Hancock . Callum then set his sights on David ' s sister Sarah who ' d returned after spending seven years in Milan . Although Sarah saw through Callum ' s act , she fell for his charms and they soon slept together . David attempted to have Callum locked up , and blackmailed Andy Carver to plant drugs in Callum ' s car . Callum caught Andy and held him prisoner in the back room of the pub , but David arrived to tell him it was his idea . David was taken to an abandoned warehouse where Callum gave him a beating with a baseball bat . With his plan failed , the last straw for David was discovering Callum and Sarah ' s relationship . He fled with an unwilling Max , but Callum tracked him down to Liverpool when Max called him on his mobile . Kylie eventually returned to David and was shocked to find that , through above - board legal means , Callum had gained partial custody of his son with the intention of gaining full parental rights . Max later found a gun in his bedroom at Callum ' s flat , causing Sarah to see Callum ' s true colours and they split up . When Jason Grimshaw stood up to Callum for harassing Sarah and her daughter Bethany , he was attacked by Callum and his heavies and ended up in Weatherfield General . Unbeknown to Callum , Max had witnessed the attack and grew to fear his father and refused to be with him . Once Jason ' s father , Tony Stewart discovered who had beaten his son , he found Callum and gave him a beating in return , although the intervention of Liz McDonald stopped Tony from going too far with his revenge . In September 2015 , Callum was under pressure to pay off a £20 , 000 debt to drug dealer Denton and tried to extort the money from the Platts in return for relinquishing his rights to Max . He began to harass the family and threatened them with violence unless they got him the money . Events reached a climax when Sarah tried unsuccessfully to record Callum talking about his misdeeds and he attacked her inside No . 8 . She was saved by Kylie who killed the thug with a blow from a wrench to the head . David , Kylie and Sarah planned to dump the body in Weatherfield Canal but fate was against them and they were forced to secrete the corpse in a manhole under their garage which was being converted into a granny annexe for Gail Rodwell . Before his death , Sarah had become pregnant by Callum . Although she considered an abortion , she eventually gave birth to their son , Harry Platt , on 21st March 2016 . The secret of Callum ' s death , and the location of his body , remained a secret known only to David , Kylie and Sarah for eight months , with the three of them dealing with the matter with varying degrees of composure . On the night of Nick Tilsley ' s wedding to Carla Connor in May 2016 , the hiding place was discovered when Tyrone Dobbs crashed his pick - up truck through the front of the annex . The weight of vehicle cracked the flimsy concrete covering the manhole , breaking it open . The stench of the decomposing body left no doubt in David ' s mind that discovery was imminent and it was indeed only a matter of hours before builders made the discovery and alerted the police . A credit card on the corpse gave its identity away and a murder investigation began . Quotes . " Is he bothering you ? " ( First line , to Eva Price ) " You ' ve made a big mistake , old man ! " ( to Tony Stewart after being beaten up by him ) " All these years and you still haven ' t learned ? I always get what I want . " ( to Kylie Platt after she confronts him over harassing Audrey Roberts ) " That is a big mistake , you stupid , stupid girl ! You stupid girl ! " ( Final line to Sarah Platt , before being killed by Kylie )