A 36-year-old Martinez man has been arrested on suspicion of murder in connection with a fatal stabbing on Francis Court, according to the Martinez Police Department. Police identified the suspect as Marcos Iriarte-Valdez, a resident of the 1600 block of Ashwood Drive. Following the homicide, investigators worked with community members and other law enforcement agencies to identify a license plate connected to the case. The following day, Aug. 5, he was ordered released on his own recognizance and referred back to home detention monitoring. As the homicide investigation progressed, detectives obtained an arrest warrant for Iriarte-Valdez on suspicion of murder and committing a felony while released on his own recognizance.