and last updated 2021-04-05 16:43:10-04 DENVER â Police in Denver arrested a man in connection with a T-bone crash that killed a mother of two in downtown Denver Saturday night. John Dahmer, 40, was booked into the Denver City Jail on vehicular homicide charges. The crash happened just after 10 p.m. at the intersection of Lawrence Street and 18th Street. Denver police said the driver of one of the vehicles was pronounced dead at the scene and said others were injured. The fatal victim was identified by family as Jessica Marie Allen. Her mother told Denver7 Allen was delivering food when she was broadsided at the LoDo intersection and died.