Principal of St Stephen’s College Rev Valson Thampu on Sunday contested the charges that he tried shielding the teacher accused of molesting a PhD student. Thampu claimed he had offered the girl to change the guide but she had “refused” to accept the suggestion.“When the girl had approached me with the complaint she had insisted that the matter not be treated as one of sexual harassment to solely ensure that her PhD is completed on time. Understanding her concern, I suggested her to change the guide but she had not accepted the suggestion and insisted on completing the remaining research under him,” Thampu said in a detailed statement.