but it escalated for mark smich. >> mallard and smich and a group of friends went on what they calledmissions, and the mission was to steal things. >> these guys were out stealing anything they could get their hands on. they were stealing a lot of construction equipment, bringing it in, stripping it down, selling it for parts. >> five days after tim bosma went missing, cops tracked mallard to a bank where he spotted withdrawing three grand. minutes later, police arrested him. and right there in his pocket, the keys to tim's truck. police have a lot of questions for mallard. where is the truck? and more importantly, where is tim bosma? coming up. cops follow a trail of clues that lead them to a disturbing find. >> just when you think something stranger couldn't h n, it does. >> that's next. health care. it's so outdated. >> time for a change. >> at oak street health, we're. >> changing what it means to get older by changing healthcare. >> for the better. >> i just. >> made this appointment yesterday. that's more like it. >> in fact, we specialize in caring for older adults. >> here, ev