Alhambra, California (CNN) -- At first, the pool builder thought his Bobcat bulldozer struck garbage as he dug a hole in a residential backyard. After all, in the older neighborhoods of San Marino, California, people used to bury their garbage. But the plastic bag didn't contain trash. Jose Perez, operating the Bobcat with his father as a co-worker, asked his dad what was inside. His father grabbed an 18-inch piece of reinforcement bar to poke around. "He looked inside it, and he mouthed to me that there were bones in it," Perez testified Wednesday in a Los Angeles County court. "He thought it was a dog, but it didn't look like a dog.
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NEW: Almost entire skeleton found after skull's discovery, anthropologist testifies
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The fractured skull received at least three blows, a forensic pathologist says
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Christian Karl Gerhartsreiter is accused of murder
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He led a life of multiple identities and once claimed to be "Clark Rockefeller"
When she asked him why, @placeholder told her he was having plumbing problems.