“In May 1836, after anti-abolitionist opponents in St. Louis destroyed his printing press for the third time, Lovejoy left the city and moved across the river to Alton in the free state of Illinois. In 1837 he started the Alton Observer, also an abolitionist paper. On November 7, 1837, a pro-slavery mob attacked the warehouse where Lovejoy had his fourth printing press. Lovejoy and his supporters exchanged gunfire with the mob, which fatally shot him. He died on the spot and was soon hailed as a martyr by abolitionists across the country.”
– Wikipedia entry for Elijah Parish Lovejoy