BELLFONTE — The Howard-area man convicted of trying to kill his ex-girlfriend’s boyfriend in a drive-by shooting got his prison sentence lengthened 15 months by a judge Friday.

Randall Brooks, 39, was sentenced in July to spend 35 years in a state prison. He was convicted of attempted homicide, jury tampering, intimidating a witness and stalking among others, and the judge assigned different punishments for each count.

Brooks was handed 20 to 40 years on the attempted homicide charge.

But prosecutors in the Centre County District Attorney’s Office thought some of the sentences were not harsh enough. In a court filing, District Attorney Stacy Parks Miller wanted what amounted to an additional eight years in jail.

On Friday, Judge Bradley P. Lunsford adjusted the sentence to raise Brooks’ minimum prison sentence to 36 years and three months.

Brooks was arrested after the drive-by shooting of Matthew Ross in December 2009. Ross survived, called 911 and testified at Brooks’ trial.

Brooks was obsessed with the ex-girlfriend, Parks Miller has said, and harassed and stalked the woman to the point that he was charged. He tried to get her to change her testimony and even bribed her.

When that didn’t work, he tried to hatch a plot to influence a juror for his trial, which was canceled after his confidante — a fellow inmate — turned him in to police.

Brooks’ father, Daniel Brooks, 67, is charged with conspiracy to commit jury tampering and obstructing the law after police said the son discussed the plot with him during jailhouse visits.