Gumshoe (1971)

 

Directed by Stephen Frears. Albert Finney. Now on Tubi. Never seen it but it has been on my want list for a long time. Private detective. 

https://en.wikipedia.org/wiki/Gumshoe_(film)

https://twentyfourframes.wordpress.com/2010/01/01/gumshoe-1971-stephen-frears-2/

http://every70smovie.blogspot.com/2013/02/gumshoe-1971.html