OPEC+ oil cuts - Chess cheating scandal - Potential serial killer

This year, five men, each alone in the dark at night or early in the morning, were killed between July 8 and Sept. 27 in Stockton [a city of more than 300,000 people]. None of the men were robbed, and police said the cases do not seem to be connected to drugs or gang violence. The concerns about a potential serial killer grew on Monday, when authorities confirmed that two cases from April 2021 were linked to the five homicides.
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Of the seven people who were shot, five were of Hispanic descent, but [Stockton Police Chief Stanley McFadden] said Tuesday that a motive was unclear. Last week, authorities cautioned residents to be vigilant, avoid traveling alone and stay in well-lit areas of the city.
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As of Tuesday, police have not found any witnesses in the Stockton killings. Investigators have reviewed hundreds of hours of video, [McFadden] said, but none of the shootings were caught on camera. McFadden said that this series of homicides is “abnormal” for Stockton. Thus far in 2022, 43 homicides have been recorded in the city — up from 32 this time last year.