Man frowns in mugshot after ‘shooting dead four train riders execution-style’

Rhanni Davis (right) has been arrested and charged in the shooting deaths of four Chicago train passengers at the Forest Park CTA station (Pictures: AP/Forest Park Police Department)A man frowned and appeared upset after being caught for allegedly shooting dead four train riders ‘execution-style’ as they slept.Rhanni Davis, 30, wore a white hooded jacket and seemed to give a defiant expression in his mugshot released by the Forest Park Police Department a day after the mass shooting