Hannibal murder suspect heads to prison after guilty plea

Gary Wiltermood

One of the two men charged in the murder of a Hannibal Abel's gas station clerk reached a plea deal on Monday.

According to Missouri Attorney General's Office spokesman Eric Slusher, Gary Wiltermood pleaded guilty to second-degree felony murder.

He was sentenced to 20 years in state prison.

Slusher was not able to confirm whether Wiltermood would get credit for time previously served or the possibility of parole eligibility.

Wiltermood was charged in the Oct. 8 shooting death of 61-year-old Adrienne Arnett.

A second man arrested in connection to the case plead guilty to second degree murder charges last month.
Michael Studer was sentenced to 25 years in prison.

The shooting occurred during a 3 a.m. robbery at the Abel's Shell Station at 100 Shinn Lane.

Wiltermood told Hannibal police investigators that he drove Studer to the gas station and participated in the robbery.