Steven was a police officer with London's Metropolitan Police for 30 years, with over half of that time spent as a Scotland Yard detective. He was part of investigations into the killings of over 100 victims. He achieved the rank of detective inspector and was a nationally recognised senior investigating officer (SIO). He not only led murder enquiries but was also a detective constable and detective sergeant at Scotland Yard, so has an insight into all levels of investigations. Working on Scotland Yard's Anti-Terrorist Branch during the time of the London bombings on 7th July 2005, Steven received a commendation for his work on that investigation from the Metropolitan Police Commissioner, Sir Ian Blair.