UNDATED (WHDH) -- A renewed campaign has been launched to find the person who killed Molly Bish.
Her mother is pleading for the killer to surrender peacefully.
Bish's sister also hopes to get flyers with information about the case in every town and city in the state.
Bish disappeared 13 years ago while working as a lifeguard in the town of Warren. Bish would have turned 30 in August.
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