D. Mower was a citizen of Sandford. When Nicholas Angel first arrives in the town and goes to the pub, he sees that there are many underage drinkers. When questioned about his age, Mower becomes increasingly nervous and confused, which leads to him to be kicked out. Afterwords, when Nicholas is taking a drunk back to the station, he comes across Mower in a parking lot and arrests him.
Later, when the Neighbourhood Watch Alliance is revealed to be a murderous cult and attempts to kill Nicholas, Mower's corpse is found underneath Callahoun Park. He was killed for his drunken indescretion.