Aaron Hernandez has been moved to an even more restricted unit of the maximum security MCI-Souza Baranowski Correction Center after being caught smoking with two other inmates in the prison yard.

The Daily Mail reports just what the trio was smoking remains under investigation. Inmates at all Massachusetts prisons are strictly forbidden from smoking materials of any kind. The website adds the former New England Patriots star tight end was known to be a marijuana chain smoker prior to being sentenced to life in prison without parole in the June 2013 killing of onetime associate Odin Lloyd.

The infraction is the second charged to the 25-year-old Hernandez since he's been held at the facility over the last several months. In May, he was sent to a segregation unit after being accused of serving as the lookout for a brawl prison officials later deemed was gang-related.

Later that same week, Hernandez was found to be sporting new prison tattoos, including a Bloods gang symbol, on his hand and the branding "Lifetime" stenciled across his neck.

Hernandez is expected back in a Suffolk County courtroom later this month for a hearing in the double murder case he faces stemming from a drive-by shooting in downtown Boston in 2012. In that incident, authorities allege Hernandez opened fire on Daniel de Abreu and Safiro Furtado at a traffic stop after one of them spilled a drink on him in a nightclub and failed to apologize.

Meanwhile, attorneys for Hernandez filed a motion this week seeking approval from a Bristol County judge to question a woman who previously told lead attorney James Sultan that one of the jurors sitting in on the Lloyd case was "untruthful" to the court during the selection process.

Sultan also told the court the unidentified woman has had "extensive persona contact" with Hernandez since his 2013 arrest.