Lieutenant-Colonel Richard Lyons Otway Pearson CB ADC JP (1831–30 May 1890) was Assistant Commissioner (Executive) of the London Metropolitan Police from 1881 to 1890. Pearson was the son of Henry Shepherd Pearson and Caroline Lyons, daughter of John Lyons of Antigua and sister of Edmund Lyons, 1st Baron Lyons. He was educated at Eton College and the Royal Military College, Sandhurst. He was commissioned into the Grenadier Guards. During the Crimean War (1854–1855), he served as aide-de-camp to General Sir George Brown, and was present at Alma, Inkerman and Sebastopol.