OKLAHOMA CITY (AP) — An Oklahoma appeals court on Thursday upheld the death penalty of a man convicted of killing his girlfriend and her two children then burning their mobile home in 2010.

The court ruled that testimony by the victims' relatives saying Shaun Bosse should be executed should not have been allowed, but was harmless error because of other evidence.

Bosse, 34, was convicted on three counts of first-degree murder and arson in the deaths of 25-year-old Katrina Griffin, 8-year-old Christian Griffin and 6-year-old Chasity Hammer. Their bodies were found July 23, 2010, in their burned...