SAN ANTONIO - Testimony is underway in the trial of a man accused of hitting and killing two bicyclists in Helotes on the morning of Oct. 1, 2009.
Authorities say Greg and Alex Bruehler died after being hit by a truck while riding together on a tandem bicycle on an improved shoulder of Highway 16.
During opening arguments the prosecution told jurors Gilbert Sullaway, 42, is guilty of criminally negligent homicide because he was speeding, failed to stay in his lane and did not keep proper watch.
"They didn't know what hit them," explained prosecutor Lorina Rummel. "Their injuries were so life threatening that Mrs. Bruehler died on the side of the road and her husband had some life signs.”
Defense Attorney Mark Stevens argued Sullaway was never arrested for any wrong doing at the scene of the accident and didn't even receive a citation. Defense Attorney described Sullaway as a good man.
“Gilbert Sullaway is a hard working man and he's a family man. He's active in his church… he's not a criminal," said Stevens.
The defense told jurors Sullaway glanced over at a sign on a newly built fire station when he veered off his lane and hit the couple.
Sullaway could face up to ten years in prison. The couple leaves behind a 9 year old daughter.