While in court last week to plead guilty to first-degree murder, Jared Remy showed what appears to be a neo-Nazi jailhouse tattoo, The Boston Globe reported.

In a photo captured by Globe photographer Joanne Rathe, Remy was seen with a tattoo on his hand bearing the number 88.

"That's definitely a neo-Nazi tattoo," said Mark Potok, a senior fellow with the Southern Poverty Law Center , which teaches law enforcement to recognize hate groups and symbols, explaining that 88 stands for "HH" - H being the eighth letter in the alphabet - or "Heil Hitler."

Remy pleaded guilty to the murder of his girlfriend, Jennifer Martel, and was sentenced to life in prison without parole.