According to the original post, they are suspended pertaining an investigation.Yup
1. What is gross misconduct?Gross misconduct is behaviour, on the part of an employee, which is so bad that it destroys the employer/employee relationship, and merits instant dismissal without notice or pay in lieu of notice.
(Such dismissal without notice is often called ‘summary dismissal’.)
But thank you for giving us the baying mobs opinion.