The night clerk at a Kelseyville convenience store and gasoline station was fatally shot by an armed robber Friday night, a Lake County official said.

Forrest Seagrave, who died Saturday morning, was a Kelseyville native well known to people who stopped by the Mt. Konocti Gas & Mart late at night, County Supervisor Rob Brown said Saturday.

Brown, who represents the Kelseyville area, said he was seeking donations to create a $10,000 reward for information leading to the arrest of the killer.

Calpine Corp., whose workers frequent the store on Kelseyville's Main Street, pledged $2,500 to the reward fund, Brown said.

According to a short statement from the Lake County Sheriff's Office, the shooting occurred during an armed robbery at about about 10:45 p.m. Friday.

The Lake County News reported that the clerk at the store, known to locals as Store 24, was shot in the chest and the hand by a man wearing a dark hoodie and dark clothing, with a bandana around his face.

The suspect took a small amount of money and ran across a nearby field, the report said.

The sheriff's office described the suspect as 5ft. 9in. to 5ft. 11 in. tall with a thin build, blue jeans and gloves. A surveillance camera caught images of the man walking into the market and then walking out about 20 seconds later. His face is not visible beneath the hood.

Brown called the shooting "a frightening event," noting that it occurred across the street from Kelseyville High School.

The county supervisor, a bail bondsman, said it was important to quickly offer a substantial reward in order to get leads in the case.

"Somebody knows who did it," he said.

Brown said he had already received calls and passed information along to the Sheriff's Office.

Seagrave, who graduated from Kelseyville High School, was a "quiet kid" who befriended patrons at the convenience store, he said.

Brown said that Seagrave had been living with and caring for his mother.

"For this to occur within feet of our high school and on camera is incredibly bold and we as a community need to act," Brown said in an email sent Saturday morning to numerous people.

A man who answered the telephone Saturday at the gas station and market declined to talk about Seagrave or the shooting. Seagrave's Facebook page said he had worked at the store since 2006.

Brown said that anyone wishing to donate to the reward fund may call him at 349-2628. Anyone with information on the shooting is asked to contact the Sheriff's Office, 263-2690.