Convicted killer Jeffrey Willis is no longer an inmate of Muskegon County Jail.

Muskegon County Sheriff Michael Poulin said Willis was transferred to the Michigan Department of Corrections early Wednesday, Dec. 20.

Read more: Judge asked if Willis can stay in jail until after Heeringa trial

Willis was arrested on May 17, 2016, and he's been lodged at the Muskegon County Jail ever since.

A judge sentenced Willis to life in prison on Monday, Dec. 18.

He was convicted in November of first-degree murder for the 2014 fatal shooting of Rebekah Bletsch.

Willis will be processed at the Michigan Department of Corrections' Prisoner Reception Center located in Jackson, Mich. He's expected to be at that facility for around 45 days.

The D.O.C. will later assign Willis to a permanent facility in the state.

Once processed into the system, Willis will appear on the D.O.C.'s "Offender Information Tracking System" allowing members of the public to know the location where he'll serve the life sentence.

However, he's expected to return to Muskegon County in March 2018 to stand trial for the 2013 kidnapping and death of store clerk Jessica Heeringa.

Read more: 'I'm not a monster': Jeffrey Willis gives interview from jail as murder trial nears

Read more: Prosecutor and lawyer weigh in on what's next for Willis

The trial for Heeringa's murder is scheduled to begin in Muskegon County Circuit Court on March 6.

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Jon Mills is WZZM 13's Lakeshore reporter, follow him on Twitter or send him an email.