Felix Badillo Tapia of Brownsville, Texas has pleaded guilty to a single misdemeanor charge over a bus crash on Interstate 40 that killed four people near Little Rock, Arkansas.

The bus that Tapia was driving slammed into a pickup truck and a tractor-trailer, killing three bus passengers and the pickup’s driver. Twenty others were injured.

Investigators in the case couldn’t prove that drugs Tapia had in his possession at the time of the November 2007 accident were illegal or that he was intoxicated at the time. Tapia has previously faced felony charges, and will serve one year in jail and will pay a $1,000 fine from this case.

According to the California Highway Patrol, the driver of a casino-bound charter bus has been arrested on suspicion of driving under the influence of drugs.

The bus crashed and killed eight people.

California authorities are investigating whether prescription or nonprescription drugs were involved in the crash. The bus drifted off a two-lane road before the driver overcorrected and swerved back onto the road before tumbling into a ditch, ejecting some passengers. Other passengers on the bus were rolled and crushed. The bus also had invalid license plates.

“The roof collapsed down, the windows were broken out, and the bus was not only rolled over onto its side, it rolled completely over. It was facing the opposite direction,” said patrol spokesman Patrick Landreth.

This has been at least the eighth accident in the last three years that has involved buses carrying people to and from casinos that have caused death to the passengers. While the bus had “Greyhound” marked on its side, a Greyhound official said their company sold the bus more than two years ago.

According to a story in the Fort Worth Star-Telegram, a state official has said that two of every five charter bus companies in Texas have been ordered off the road in the past two years.

In the last year alone, 201 companies had their authorization revoked, leaving about 300 companies with permission to operate in Texas. However, some of the grounded companies have changed their name and returned to the bus industry—information that has come into view after a fatal bus accident that killed 17 people in August.

The Houston-based company changed their company name after being shut down for safety violations. Since the crash last month, two other bus companies in Irving and Houston have been shut down because of affiliation with revoked companies.

Even though motor coach safety is mostly under federal law, the state Transportation Department is trying to make it easier for the public to have access to bus records. Later this month, the state will begin posting complaints filed against bus companies, results of investigations, and other helpful documents at www.txdot.gov <http://www.txdot.gov> .