In McKinney, Texas, as the holiday season begins to unfold, the city is abuzz with various events and updates.

### Recent Arrests and Ongoing Investigations
In a significant development, McKinney police have arrested three individuals in connection with a fatal shooting that occurred over the weekend. The incident, which took place near the intersection of Chestnut and Colorado streets, resulted in the deaths of 17-year-old Kajerrlyawn Jordan Jerome Mack and 22-year-old Lamarrya Dwayne Ransem. Roman Miguel Castillo, 21, and two juvenile suspects have been charged with capital murder. The police are continuing their investigation but have stated that they do not believe there are any other suspects involved[1][3][4].

### Holiday Preparations
As Thanksgiving approaches, the city is gearing up for festive celebrations. The annual Christmas tree lighting is set to take place on November 29 in downtown McKinney, promising an evening of local artists, specialty items, delicious food, live entertainment, and holiday activities. City offices will be closed on November 28 and 29 for the holiday[2].

### Health and Safety
Residents are advised to be cautious due to an increase in mosquito pools testing positive for West Nile Virus. The city will be conducting mosquito spraying in affected areas, typically between 10 p.m. and 5 a.m., weather permitting[2][5].

### Community Events
The fall season has been vibrant in McKinney, with various family-friendly events across the city. While specific high school sports scores from the past 24 hours are not available, the city's schools, including McKinney, Wylie, Little Elm, and Princeton ISDs, have been active in their sports seasons[3].

### Weather and Air Quality
As of November 27, the weather in McKinney is expected to be mild, with temperatures in the mid-60s to low 70s. The air quality is generally good, with no major alerts issued. However, pollen counts are moderate, with cedar and oak pollen being the primary contributors.

### Other Local News
The City of McKinney recently received all six transparency stars from the Texas Comptroller’s program, recognizing its commitment to transparency. Additionally, voters approved four of five general obligation bond propositions in the recent election, which will support various community projects[2][5].

As McKinney moves into the holiday season, the city remains vibrant with community events, ongoing public safety efforts, and a focus on transparency and public health.