PACIFICA (CBS SF) — Authorities have increased the reward to $10,000 in the search for a man suspected of shooting his pregnant ex-girlfriend last April, U.S. Marshals said Tuesday.

Ricardo Colindres, 26, is a transient with family ties to Brisbane, Lodi and Burson. He also frequents Las Vegas, Deputy U.S. Marshal Joseph Palmer said.

On April 27, at the Casa Pacifica Apartments, Colindres allegedly tried to abduct his ex-girlfriend, who was eight months pregnant, before he shot her in the head.

Colindres fled the scene just after 8 a.m. and has not been seen since, Palmer said. He was quickly identified as a suspect, and his name and description were released to the media.

Police asked the public to be on the lookout for Colindres and his 2003 silver Toyota Camry, license plate number 6CGN644.

U.S. Marshals initially offered a reward of $2,500 for information leading to the location, arrest and conviction of Colindres.

“We are continuing to investigate this case to the fullest extent possible,” said U.S. Marshal Don O’Keefe. “We feel that Colindres still being at large is unacceptable, and we encourage the public to assist us in locating and safely apprehending him.

“The victim in the case deserves justice and closure, which she is being denied every day he remains on the streets,” O’Keefe said. “For her sake, and the sake of public safety, we implore those with any knowledge of him or his possible whereabouts to contact law enforcement immediately.”

Colindres is Hispanic, stands about 5 foot 5 inches tall and weighs about 125 pounds. He has brown hair and brown eyes, is armed and is considered extremely dangerous, Palmer said.

The gun Colindres used has not been recovered.

Anyone with information about this incident has been asked to call the U.S. Marshals at (800) 336-0102, or email usms.wanted@usdoj.gov.

Colindres is listed on the Northern California Most Wanted website.

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