Please answer the following question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: why Dr. Bill Capa falls into a deep depression? Title: Color of Night Movie plot: This section's tone or style may not reflect the encyclopedic tone used on Wikipedia. See Wikipedia's guide to writing better articles for suggestions. (November 2015) (Learn how and when to remove this template message) Dr. Bill Capa (Willis), a New York City psychologist, falls into a deep depression after an unstable patient commits suicide in front of him by jumping from his office window. The sight of the bloody body of his patient clad in a bright green dress causes Capa to suffer from psychosomatic color blindness, taking away his ability to see the color red. To restart his life, Capa travels to Los Angeles to stay with a friend, fellow therapist and best-selling author Dr. Bob Moore (Bakula), who invites him to sit in on a group therapy session. But one night Moore is violently murdered in the office and Capa is plunged into the mystery of his friend's death. Moore would gather his patients every Monday for a discussion of their problems. Police detective Lt. Hector Martinez (Blades) considers them, and possibly Capa, suspects in the murder. Capa continues to live in Moore's house and begins an affair with Rose (March), a mysterious girl who comes and goes. He takes over Moore's therapy group and learns of their pasts and obsessions: Clark (Brad Dourif) suffers from severe obsessive compulsive disorder and insists on cleanliness and counting things. He also has a violent temper, and months earlier beat up his wife. Sondra (Lesley Ann Warren) is a nymphomaniac and kleptomaniac. She stabbed her father with a knife and fork and her husband died of unnatural causes. Buck (Lance Henriksen) is a suicidal ex-cop. The murder of his wife and daughter remains unsolved. Casey (Kevin J. O'Connor), the arrogant son of a wealthy man, paints sado-masochist works of art. He once burned down his father's house. Richie is a transgender 16-year-old who wishes to transition to female. Richie also has social anxiety disorder, a stutter and a history of drug use. One of these patients is violently murdered. Capa also...
A:
patient commits suicide