A man accused of killing his brother in Deer Park was found dead over the weekend after a SWAT standoff in Lexington, police said.According to court documents, around 8:42 a.m. 70-year-old Michael Mueller was visiting the victim at his home in the 7000-block of Monterey Avenue.During the visit, police said Michael became upset, grabbed a gun and shot the victim nine times while he was lying in bed.The victim has been identified as Michael's brother, 66-year-old Mark Mueller, court documents said. Mark was pronounced dead at the scene.Police said Michael fled the scene shortly after the shooting.He was found at a hotel in Lexington, Kentucky over the weekend and after a SWAT standoff, he was found dead inside the hotel from a self-inflicted gunshot wound.Police said after the shooting, they received information Michael had a "small arsenal of weapons" at his home in Madisonville.After searching Michael's home with the consent of his father, they discovered 52 loaded firearms.