Police say DNA tests have identified a man arrested for molesting two children as the same one responsible for four other child molestations around the state, one of which was at knifepoint. Marino Antonio Hernandez was charged last month wilth molesting a child in San Mateo and another in Redwood City. San Jose police spokesman Joseph Deras says they have DNA evidence that links Hernandez to the sexual assault of a seven year old girl at knifepoint in San Jose last year. He says the DNA also links Hernandez to three other victims in Santa Ana, East Palo Alto and Redwood City. Hernandez already has been charged in San Mateo County with felony child molestation. He´s scheduled to be back in court on Friday. In the meantime, he´s being held in the San Mateo County jail.