PHOENIX -- A jury has been sent to begin deliberating Jodi Arias’ fate, deciding whether she should be sentenced to life in prison or execution.

Arias spoke to jurors Tuesday in the penalty phase of her murder trial, asking them to spare her life. She says she’d use her time in prison to bring about positive changes, including helping recycle trash and raising money for domestic abuse victims.

The same jury earlier this month convicted the former waitress of first-degree murder in the 2008 killing of her one-time lover.

Arias said Tuesday she “lacked perspective” when she told a local reporter in a post-conviction interview that she preferred execution to spending the rest of her days in jail.

Her lawyers have said Arias is the only witness they’ll call to testify on her behalf.