The son of Suffolk’s sheriff was convicted in Suffolk Circuit Court Thursday of refusal to take a blood or breath test.

Raleigh H. Isaacs Jr., 50, was also was convicted of the charge in General District Court but appealed it to the higher court. A charge of driving under the influence was dismissed in General District Court.

He was sentenced to a one-year suspension of his license.

It was the fourth time since March 2006 that Isaacs has been charged with driving under the influence in Suffolk. Every time, the charge has been reduced, dismissed or not prosecuted.

This charge was handled by a Norfolk prosecutor with a substitute judge.

The incident occurred on Aug. 28, when officers were dispatched about 11:30 p.m. regarding a possible drunken driver who had left the Ruby Tuesday restaurant on Godwin boulevard after arguing with other patrons, city spokeswoman Debbie George said at the time.

Officers found the vehicle stopped in the middle of North Main Street and allegedly noticed a strong odor of alcohol and an open container of beer.

Isaacs also has been charged with driving under the influence in Suffolk in March 2006, October 2006 and June 2008.

In the first 2006 incident, he was charged with driving under the influence and reckless driving. The reckless driving charge was not prosecuted. The DUI charge was reduced to reckless driving, and he was given a 30-day suspended sentence and a $1,000 fine.

In October of that year, Isaacs was charged with driving under the influence, refusing to take a blood or breath test and reckless driving. The DUI and refusal charges were dismissed, and the reckless driving charge was reduced to improper driving. He received a 30-day suspended sentence and a $500 fine.

In June 2008, Isaacs was again charged with DUI, refusal and reckless driving after the van he was driving slammed into the front window of Pinner’s Flower Shop on West Washington Street, which had to close for four months. Charges of driving under the influence and refusal were not prosecuted in that wreck. Isaacs pleaded guilty to reckless driving, his license was suspended for six months, and he served 10 days in jail.

Shortly after the most recent charge, he was charged with drunk in public for an incident on Oct. 7. He was found guilty on that charge in January in General District Court.