A former Oxford University PhD student who was accused of raping a woman before texting to say sorry has walked free after a jury failed to reach verdict for a second time.
Statistician Sherman Ip, 25, was said to have forced the woman down on to his bed and pulled off her clothes before launching the attack on 14 May 2013.
But Ip told jurors "she consented" and says he thought "everything was normal" when they had sex at her parent's house the following day.
The woman, who cannot be identified, claimed she fled Ip's flat in tears after he forced her onto his bed, pulled her clothes off, and raped her.
Southwark Crown Court heard she sent Ip a private Facebook message saying what happened was 'semi-rape' and pressed charges in October 2014 after receiving a text from him saying: "I am really sorry for raping you."
But Ip told jurors he sent the apology because:"I wanted to get [her] back and I would do anything to get back with her."
Two juries have now failed to reach a verdict on a single charge of rape at Southwark Crown Court.
Ip is unlikely to face a third trial but prosecutors are expected to make a final decision within a week.
He has a masters degree in Physics from University College London and in 2015 moved to Oxford University for the first year of his PhD as part of the Oxford Warwick Statistics Programme.
Ip, who is now studying at Warwick, told the court the woman came to his flat in Euston Square, because she "wanted to talk" on 14 May 2013, but they ended up having consensual sex.
Ip said: "She said 'let's have sex' and then she sat on the bed, laid on the bed."
Prosecutor David Povall asked: "And this was all, the two of you had sex and everything was alright was it?'
"Everything was normal," replied Ip.
He said the woman became jealous when he told her about his relationship with another girl.
Ip said they talked about it before having sex at her parent's house on 15 May 2013.
Mr Povall said: "I suggest that your reason for doing that is to try to say that she was lying about being raped the day before."
Ip replied: "I wouldn't have made up that event on the 15th...she wanted to have sex with me."
Ip, of Burcot Gardens, Maidenhead, Berkshire, denies rape.