Updated

A man accused of tying up and killing a good Samaritan who rented a Pennsylvania motel room for him, then videotaping the body and saying "I do what I want," has been sentenced to life in prison without possibility of parole.

Twenty-seven-year-old Jeffrey Knoble was convicted Tuesday of first-degree murder in the March 2015 death of Andrew "Beep" White. But he was acquitted of robbery, which prompted prosecutors to drop plans to seek capital punishment.

Knoble apologized Wednesday for what he called "a stupid decision" but asserted that his convictions were unwarranted for a variety of legal reasons.

Northampton County Judge Emil Giordano tacked on additional time for other convictions, calling the defendant "a merciless and ruthless and cold-blooded murderer" who killed a friend who only tried to help him.