3.5 Love the location shots in old San Fran, especially the fabulous finale at Fort Point in the Presidio, which also features prominently in Point Blank (1967). It is still there and open to the public Fri-Sun. 40 years in the Bay Area and I have never been there, but now I need to go visit it.
It is the "old" story of doing anything for love and an okay entry in the film noir genre. It is easy to have huge sympathy for the "bad guys" since there is no clear answer to why the ex-husband actually broke into the house, but the clean-shaven cop brother is so annoyingly single-minded in his pursuit for the killer that it is hard to care about him and his obsession for duty and glory.