Your film is "Suture," an interesting and little-known little thriller
from 1993. I recognized it from your description. I've gathered some
info about it for you.
Internet Movie Database: Suture
"Suture takes a non-traditional approach to casting, placing an
African-American actor in the role of an identical brother to a white
man. Equally evocative is the choice to shoot in black-and-white,
adding further contrast to the striking noir style and dark undertones
of this 'exceedingly smart' (Variety) psychological thriller that is a
'riveting' (Boxoffice) piece of filmmaking! You can barely tell
Vincent and Clay apart... Vincent--the prime suspect in their father's
murder--decides to kill Clay so he can swap identities and pin the
crime on his new-found sibling. But Clay miraculously survives the
attempt on his life. Now suffering from amnesia and thinking he's
Vincent, Clay must prove that he's not the killer that everybody
thinks he is...before he's sentenced to life for the crime he believes
he didn't commit!"
"Suture (1993) Mystery, R, 96 min.
Director: Scott McGehee Starring: Dennis Haysbert, Mel Harris, Sab
Shimono, Dina Merrill, David Graf, Michael Harris, Fran Ryan, John
Ingle, Sandra Ellis Lafferty, Sanford Gibbons
Two brothers are separated at birth?Vincent (Mel Harris) and Clay
(Dennis Haysbert) later meet at their father's funeral. Clay is a
good, unsuspecting man who gets blown up by a car bomb?set off by his
brother Vincent in order to cover Vincent's murder of their father.
Clay lives, suffers amnesia, goes through plastic surgery, and is
helped by his psychiatrist (Sab Shimono) to become 'Vincent' (who
everyone believes he is). The question is?will Clay regain his true
identity before the real Vincent returns? (It's also clever that one
brother is white, the other black.)"
Films and TV: Suture
"When Clay Arlington's father is murdered, his estranged half-brother
Vincent becomes the most likely suspect. Eager to throw the police off
his trail, Vincent invites Clay to visit him soon after the funeral,
then secretly plants a bomb in the car Clay is to drive. Vincent has
put his own identification in Clay's wallet, so police will think that
he's the one who has died in the explosion. However, Clay survives the
bombing, and plastic surgeons reconstruct his face and body from
pictures of Vincent. Suffering from amnesia, Clay, readily accepts his
new identity. As the police tighten their circle of evidence around
Vincent, memories of Clay's own life come flashing back. SUTURE is an
unusual thriller in which the two identical brothers are played by a
black actor and a white actor, making Clay's quest for his own
identity even more strange and ironic."
Rotten Tomatoes: Suture
My Google search strategy:
Google Web Search: suture "dennis haysbert"
I hope this is the right movie. If it is not, or if anything is
unclear or incomplete, please request clarification; I'll be glad to
offer further assistanve before you rate my answer.