The Boulder Police Department has just updated its most wanted list, with the men on it accused of crimes ranging from assault to bike theft.

And then there's Thayne Smika, charged last year with the 1983 murder of Sid Wells, boyfriend of actor Robert Redford's daughter, Shauna. Smika's whereabouts are unknown, as is his current appearance -- so Boulder has done a series of illustrations (a new batch was created this summer) speculating about what he would look like today. See all of them and more below.

Continue to learn more about Boulder's most wanted, including the search for accused murderer Thayne Smika. Continue to learn more about Boulder's most wanted, including the search for accused murderer Thayne Smika. Continue to learn more about the search for accused murderer Thayne Smika. Age progression illustrations:

More from our Mug Shots archive: "Photos: Top 25 mug shots of August 2012."

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