A ‘love rat’ investigator, who only works for women, has shared a ‘loyalty check’ that she claims will uncover breadcrumbs that leads to catching their mate red-handed.A ‘love rat’ investigator, who only works for women, has shared a ‘loyalty check’ that she claims will uncover breadcrumbs that leads to catching their mate red-handed. A ‘love rat’ investigator, who only works for women, has shared a ‘loyalty check’ that she claims will uncover breadcrumbs that leads to catching their mate red-handed. Science & tech Articles | Mail Online