Caz Hammond Caroline " Caz " Hammond was the ex - fiancée of Kate Connor and a former serving soldier in the British Army . The two girls met in April 2015 . Theirs was a whirlwind romance , becoming serious on their second date and they soon became engaged . Caz ' s job meant long periods apart and Kate was therefore delighted when Caz was given leave at the time of her twenty - sixth birthday in November 2015 , arriving in Weatherfield on a surprise trip from abroad arranged by the Connors . Kate ' s father Johnny had arranged a table at Nick ' s Bistro where both girls were toasted by family and workmates . The next day , with Johnny ' s consent and good wishes , Caz told Kate that she wanted to set a date for the wedding in April 2016 - a year after they had met . Kate accepted , seemingly happy , but she had just been confessing to Michelle Connor that the intensity of their relationship scared her as in the past seven months they had just had three weeks together . Her flying visit over , Caz left Weatherfield and reported back for duty . Caz returned to Weatherfield the following month to spend the Christmas week with Kate before she left on New Year ' s Eve for her posting in Cyprus , but came back for a short visit in February 2016 . Caz returned again in April and became concerned about Kate ' s friendship with Sophie Webster , worrying that something more was going on between them . Caz followed Sophie and gave her a threat to stay away from Kate even though Sophie insisted they were just friends . A few days later , Kate told Caz she wanted to postpone the wedding which Caz immediately assumed had something to do with Sophie and told Kate the wedding was off . Later that day , Caz caught Sophie and Kate kissing and Kate ' s pleas that it didn ' t mean anything were unsuccessful . Caz departed once again , adamant that her and Kate ' s relationship was over . Later that month , Caz injured her ankle and returned to Weatherfield to be looked after by Kate . Sophie became suspicious of Caz ' s injury when Caz lied that Sophie had knocked her . Kate and Caz got back together but Kate also became suspicious when she overheard Caz talking to her support officer on the phone . Caz ' s jealousy continued and was once again convinced that Sophie was after Kate and also suspected Kate of having a romantic interest in Maria Connor . In July , Maria ' s boyfriend Luke Britton also began to suspect something about Caz and after finding her painkillers in the sink , he knew she was faking her injury . Caz ' s welfare officer confronted her about a court martial proceeding and why Caz was missing her physiotherapy so Caz asked Kate to run away with her . When Clayton Hibbs started hitting on Kate , Caz attacked him , exposing her fabricated injury . Caz told Kate that she pretended her injury was worse than it really was because she wanted to be with her and also admitted that it wasn ' t caused by an accident but from a fight with another soldier . Having had enough of her lies , Kate broke up with her and told her she didn ' t want to see her again . Caz was able to gain sympathy from Maria who let her stay with her in her flat . Luke did not approve and Caz ' s presence strained their relationship causing them to eventually break up . Maria ordered Caz to leave but a few weeks later found her sleeping rough on a bench . Caz revealed that she didn ' t get on with her parents and she had been discharged from the army , however Maria refused to let her move back into the flat . Caz manipulated Maria into letting her stay by sending a burglar to break in and scare her . Caz struggled to find a job and soon found herself in love with Maria . She made attempts to charm Maria and turned down a job in Newcastle in order to stay with her . After Caz ' s repeated attempts to get closer to her , Maria outright told her that because she was straight , there would never be any mutual feelings between them . Maria was due to visit London and told Caz she wanted her out of the flat by the time she returned . Caz got a hold of Maria ' s new credit card , followed Maria to London and started spending money on it to make the purchases under Maria ' s name more plausible . One of the items she bought was a mobile phone which she used to send abusive messages to herself . When Maria returned home in late October she was horrified to find blood splattered on her wall and Caz missing . Kate believed that Maria had seriously harmed her after hearing a distressed voicemail from Caz . Investigators instantly suspected Maria of murdering Caz and hiding the body when in reality Caz was living in a bedsit and spying on Maria with a webcam . Caz fabricated more evidence by cutting herself with Maria ' s scissors . In November , with Maria facing a murder trial , Kate ' s brother Aidan spotted Caz working in a factory but she escaped before she could be caught . A few days later , Kate realised that Caz was spying on Maria ' s flat and told Aidan that she still loved her . Caz paid Kate a visit , hoping to get back together , but attacked Kate when she learned her confession to Aidan was a ploy to trap her . Aidan rescued Kate and the police arrested Caz .