“Summer House” star West Wilson’s cousin was arrested and charged with murdering their grandmother, Gayle R. Wilson.

Dakota Sweeney, 28, was arrested by the Carrollton Missouri Police Department on Wednesday, April 22 and charged the next day with first degree murder and armed criminal action, according to a statement from Missouri State Highway Patrol.

Gayle, 75, was West and Sweeney’s grandmother, according to her obituary.

The Missouri State Highway Patrol said that at 10:25 p.m. last Wednesday, Carroll County law enforcement officials reported to a shooting at a residence and found a female deceased inside.

A witness on the scene allegedly identified a male suspect who was still on the scene. He was taken into custody without incident, the statement said.

Sweeney is currently being held at Caldwell County Jail on a no-bond warrant.

Missouri State Highway Patrol’s Division of Drug and Crime Control is currently investigating the homicide 

Gayle’s murder happened the night before West, 31, filmed the “Summer House” Season 10 reunion in New York City last Thursday.w

TMZ was first to report the news of the arrest.

Gayle’s obituary confirmed she died on April 22 at her residence.

Her surviving family members include her husband Roger, four children, and seven grandchildren, including Wilson and Sweeney.

The obituary said Gayle “lived a life marked by creativity, kindness, and cherished moments.”

West has been in the headlines for his romantic relationship with co-star Amanda Batula, which was the biggest topic of conversation at last week’s reunion.

The sports journalist previously dated Batula’s BFF, Ciara Miller, and has been close with Batula’s estranged husband, Kyle Cooke.

In leaked audio from the Season 10 reunion, Miller called Batula a “f–king snake” for dating Wilson, as the latter defended their romance.

Cooke, meanwhile, could be heard calling Wilson a “schmuck.”

While Batula fought with her co-stars, Wilson was mostly silent in the leaked audio.

After filming the reunion, Page Six obtained photos of Wilson and Batula leaving the venue together and going to a friend’s house.

This story is developing…