Magneuris Sierra is not an intimidating figure. At 5 foot 11, 160 pounds, if you saw Sierra outside an MLB locker room, you wouldn’t bat an eye, and you probably wouldn’t guess he&#8217… ...

Marlene LaMar, mother of missing teen Sierra LaMar, grasps a keychain in San Jose, Calif. on Wednesday, March 13, 2013. This keychain was given to her by Sierra before she disappeared.