The woman found guilty of manslaughter for the death of her boyfriend plans to appeal her conviction. Danielle Allen, 23, was found guilty of second-degree manslaughter last week. She is the daughter of a New York State Police inspector. Allen stabbed her boyfriend, Marcus Postell, in her apartment in York back in November of 2016. Allen's attorneys said they are appealing due to 'pre-trial issues.' If her conviction is upheld, Allen could spend a maximum of 15-years in prison.