Umno information chief Shahril Hamdan has questioned some arguments used to defend Kuala Langat MP Dr Xavier Jayakumar's decision to quit PKR and support Perikatan Nasional (PN).<br /><br />In particular, he questioned those claiming that Xavier jumped due to pressure and threats.<br /><br />"If he is really not guilty, no matter the 'threats', why the need to jump?<br /><br />"Now that he has jumped, will the investigations come to an end?" Shahril asked.