A second man convicted of robbing a Butler County lawmaker and two aides at gunpoint last year will spend up to 20 years in state prison.

Michael S. Chavis, 25, of Harrisburg was sentenced Tuesday in Dauphin County Court to robbing state Rep. Jaret Gibbons, D-10th, his chief of staff Kevin Bowser and Slippery Rock University intern Charles Goodall.

Chavis was sentenced to between 9 and 20 years in prison as part of a plea agreement reached between prosecutors and his court-appointed attorney.

Chavis’ accomplice, Donnie Dozier, 42, of Harrisburg, in June was sentenced to 12 to 30 years in state prison for the same armed holdup March 12, 2012.

The defendants, at least one who had a gun, approached Gibbons of Franklin Township, Beaver County, and his staffers about 12:30 a.m. near the apartment the legislator uses in Harrisburg.

Chavis and Dozier ordered the victims to lie on the ground and empty their pockets. No one was hurt.

Gibbons told police that the robbers, who said little during the crime, took one set of car keys, those belonging to Goodall’s Pontiac G. The suspects drove off in the car.

Not long after, a Harrisburg police patrol officer spotted the reported stolen car. He was able to immediately arrest Dozier at gunpoint, police said.

Chavis took off running but was captured quickly.

Gibbons, who serves the 10th District, which in Butler County includes both Slippery Rock borough and township, did not attend Tuesday’s sentencing.

However, he issued a statement praising Dauphin County prosecutors and Harrisburg police for their hard work on the case.

“I look forward to putting this incident behind me and moving forward knowing that the perpetrators will be behind bars for a lengthy period of time and unable to put the lives of any other citizens at risk,” Gibbons wrote.

John Baer, the lead prosecutor, did not return a telephone call this morning.

Chavis did not address the court before sentencing, said his attorney, Anne Gingrich Cornick.

Cornick declined to comment about the case, saying only that her client’s prior criminal record was a factor in his prison sentence.

In 2006, Harrisburg police arrested Chavis and another man for robbery. Chavis later pleaded guilty to both charges, according to Dauphin County Court records, and was sentenced to 2 to 5 years in state prison.

Dozier’s criminal record shows that he was arrested in Cumberland County in 1994 and charged with two separate cases of robbery of a vehicle.

Those crimes, court records showed, happened in consecutive months.

He later pleaded guilty to both charges and was sentenced to 2 to 10 years in state prison.