56 year old Akhtar Javeed was shot four times in a botched armed robbery in Digbeth in February.
The man police think pulled the trigger, Tahir Zarif from Derby, is believed to have fled to Pakistan.
A jury at Birmingham Crown Court cleared two of murder, but Suraj Mistry from Leicester was found guilty of manslaughter, and Lemar Wali from Derby was convicted of conspiracy to rob.
During the six week trial the jury heard detailed evidence of the plans to rob Mr Javeed's warehouse, and the movements of the men who carried out the attack.
It was a conspiracy which spanned three Midlands cities, and a plot to steal thousands from a lucrative business with the help of an inside man. So who were these men and how did police finally catch up with them? Chris Halpin reports.
Family man Mr Javeed was the owner of Digbeth business Direct Source 3 and was shot and killed on February 3.
The daughter and son-in-law of Akhtar Javeed, shot dead in an armed robbery in Birmingham, have paid tribute to the 56-year-old.
West Midlands Police are hunting for a murder suspect from Derby who fled to Pakistan, believed to have killed a warehouse owner.