Former cop Lorne Castle fired for gross misconduct after grabbing knife-teen's face and throat while swearing. Castle tackled fleeing Nike shoplifter and pinned him for 15 minutes until police arrived. Former colleagues praised Castle's detention of shoplifter as extremely pleasant and courteous. Store manager thanked Castle for recovering stolen goods in absence of security. Public raised over £120,000 on GoFundMe for sacked Castle. Castle won lifesaving award months before dismissal. Dorset Police deemed Castle's force on teen disproportionate despite knife falling out. Misconduct panel ruled Castle failed self-control, courtesy, respect toward teen. Video shows Castle shouting ''stop screaming like a little b****'' and threatening to smash resisting teen. Former PCC Underhill called sacking overreaction by woke Dorset Police. Retired officer Norman Brennan said Castle did what public wants from police. Castle appealing dismissal on day of shoplifter incident. Dorset Police arrested 30s man for Castlepoint shoplifting. Castle received thousands of supportive messages after sacking. Castle detained shoplifter after he ran into him entering store.