Citizen Jane (2009)

Jane Alexander, an attractive, athletic San Francisco woman, is enjoying a comfortable life in Pacific Heights with the man she loves, handsome, charismatic Tom O'Donnell. Jane's idyllic life is shattered when her beloved Aunt Gertrude McCabe is brutally murdered in San Jose. Jane's heartbreak turns to horror when a brilliant police detective, Jack Morris, finally convinces her that the killer is none other than her beloved boyfriend, Tom O'Donnell. Jane embarks on an epic journey to track down and convict the wily and resourceful O'Donnell, astonishing both police and prosecutors for her shrewdness and tenacity.