Alex Baah was jailed for 18 years today for a horrific series of rapes on a 13-year-old girl . A sex attacker who repeatedly raped a 13-year-old was jailed for 18 years today . Ghanaian Alex Baah , of south-east London , paid the girl £2 after each assault , the Old Bailey heard . The 42-year-old raped the girl at an address near Croydon and sent her perverted text messages , the court was told . The victim finally complained to police in August 2013 when she was aged 15 . Jobless Baah denied touching the girl and claimed she had planted evidence and stole his mobile to send the messages . But the jury convicted him of five counts of rape committed between 2010 and 2013 . The jury failed to reach verdicts on a further two counts of raping the girl when she was eleven and those charges were dropped . Judge Simon Farrell told the father-of-three his behaviour was ‘ wicked ' . He said : ‘ This was a terrible case . The damaged caused to this girl is incalculable . ' The judge added : ‘ Rape of a child is a particularly serious offence and calls for severe punishment. ’ The girl , who can not be identified , told how Baah would give her money after he raped her . After an attack in early August 2013 , she turned up unexpectedly at her aunt ’ s house in floods of tears . Her aunt said : ‘ As soon as she arrived at my house she walked through the door and said : “ He ’ s been touching me ” . ‘ I called her mother and she managed to get hold of her first but she was hysterical and wasn ’ t talking clearly . Then she showed me the text messages . ' Baah ’ s name had been was saved in the girl ’ s phone under ‘ P**** ’ , the court heard . Traces of Baah ’ s DNA were found on the girl ’ s clothes during a medical examination after she alerted police . Giving evidence Baah claimed : ‘ I don ’ t know how it got there , but the only way I can think is she go to the bathroom and use it against me. ’ He also tried to argue that text messages sent from his phone may have been an attempt to set him up . Baah , of Plumstead , denied two counts of raping a child under the age of 13 and five counts of rape of the same victim between 2008 and 2013 . In addition to his jail term , the judge passed a sexual offences prevention order which bans Baah from wilfully being in the presence of a girl under the age of 16 . He waved at relatives in the public gallery as he was led to the cells . A judge at the Old Bailey told Baah : ‘ This was a terrible case . The damaged caused to this girl is incalculable '
Unemployed Ghanaian sent girl perverted text messages before rapes . He denied the allegations against him , accusing the girl of setting him up . But jury today convicted him of five counts of rape and he was jailed . Score: 6