Researcher Karl Christiansen (1977) found that if one identical twin had a criminal conviction, the other twin also had a conviction in 35% of the cases.

Name: Researcher Karl Christiansen (1977) found that if one identical twin had a criminal conviction, the other twin also had a conviction in 35% of the cases.
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Karl Christiansen's study in 1977 found that there was a 35% concordance rate for criminal convictions among identical twins, indicating a genetic influence on criminal behavior.

Researcher Karl Christiansen (1977) Found That If One Identical Twin