Jamon Buggs, pictured on the first day of his trial, was found guilty of murder Tuesday in the slayings of a man and woman in Newport Beach in 2019. Jamon Buggs, 47, stared straight ahead as a jury found him guilty of gunning down Darren Partch and Wendi Miller inside Partch’s bedroom in 2019 in an execution-style killing. Todd Spitzer …