oh, my god would never not call his kids. there is four of us. by the time, the fourth day, fifth day and sixth day, we knew something was wrong. reporter: so the children started searching on their own, pinpointing an area in california s ang lus national forest. the brothers and sisters with other family and friends began driving. we stopped at every ravine and looked over every hill. all of a sudden i just thought i heard a cat or a dog enough where i just said hello and it echoed down the hill. shawn lavau found his father thursday. the 67-year-old man had been missing for six days. i hugged him and we both cried, and i said, you know, how did you make it? and he said i drank the water in the river and i ate leaves and bugs. he was heading this direction. another car was heading towards him. had bright lights on so he flashed the lights on the car. i believe at that point probably swerved, went off the road. david lavau ended up right next to another wreck