Shannon Johnson executed in Delaware after waiving appeals for 2006 Cameron Hamlin murder

(AP) SMYRNA, Del. - A convicted Delaware killer who waived his right to further appeals and sought to speed his execution has been put to death by lethal injection.

The Delaware Department of Corrections says 28-year-old Shannon Johnson was pronounced dead early Friday at 2:55 a.m.

The execution came after a federal appeals court overturned a judge's decision halting the execution in response to a last-minute effort by federal public defenders to spare his life.

Johnson was convicted of the 2006 murder of Cameron Hamlin, who was shot after Johnson found him sitting in a car with his ex-girlfriend near downtown Wilmington. Johnson later shot the former girlfriend, but she survived.

Despite saying he didn't want to pursue any more appeals, public defenders sought to intervene in Johnson's case without his consent, arguing he was mentally incompetent.