Body Count

Overview
It's about a serial killer with terminal cancer who leaves numbered cards on his victim's bodies, a girl who falls in love with him, a loser cabbie who becomes the prime suspect, an old asshole police sergeant, and a radio reporter who takes the law into his own hands.
Similar
Arsenic and Old Lace (1944)
Saw II (2005)
The Silence of the Lambs (1991)
A Crime (2006)
A Nightmare on Elm Street (1984)
Solitude of the Tormentors (2022)
Halloween (1978)
Dirty Harry (1971)
American Psycho (2000)
Axegrinder 4: Souls of Blood (2022)
Axegrinder 5: Blood Vengeance (2022)
Split Screen (2023)
Jersey Shore Massacre (2014)
Clay Pigeons (1998)
Gacy (2003)
Blue Eyes of the Broken Doll (1974)
A Dragonfly for Each Corpse (1975)
Silent Night, Deadly Night (1984)
Graduation Day (1981)
The Cat o' Nine Tails (1971)