Help regarding 306

Need experts advice. An employee of my brother's company was cough in stealing goods from factory and selling outside. When came in company's knowledge, employee didn't turn to join office next day as the manager asked him for the delivery challans & documents. Company waited him for 1-2 days and called up saveral times and also checked at his home. He was not at home and his wife tried to call him and factory people talked to him to come to factory and discuss the matter but he deny to come to office and for any meeting. Than company reported to police station for the stealing goods from factory and selling outside. After 2 days his missing report was filled by his family member and our statements were recorded by police in that week. Than FIR lodged by company against him for the theft. After a week, his body was found with poison. His family member lodged FIR under 302, 210 & 120B against brother and other colleague that he was murdered. They blamed that company people threaten him as well. After PM report, police have changed the case under 306 and 120B saying a suicide note was found with body with 5-6 names. FIR of theft by company was investigated and closed after verifying the goods sold to some person and their statements were also recorded by police. He was found guilty of offence IPC406. It’s been almost 5-6 month so company's lawyer have submitted petition to high court under IPC 482 and stay for any arrest because the FIR is totally baseless and only to clean the face from FIR lodged by the company. Court have given date of next month for hearing and ordered to SHO & IO to submit reports. But just after 2-3 days of quash application, police arrested brother from the office (After almost 8 month of incident). Rest people still not found. Brother is in jail and we are really worried as looking at scenario we are not able to understand what to do here. Bail application in lower and ADJ court have been rejected without commenting anything. Please help.