Mr Briggs, 39, died on 4 November 2013 after he was restrained and detained under section 136 of the Mental Health Act by Bedfordshire Police at the junction of Marsh Road and Willow Way, and taken to Luton police station.
Here you can read about our investigation into the treatment of Mr Briggs throughout his detention including the use of force or restraint, the assessment of physical and mental well-being, the ongoing risk assessment by officers and staff, and whether they complied with their duty of care.