Last year cops arrested Dmitry Yakovlev for allegedly murdering and stealing the identities of a jewelry importer, a former NYPD mechanic and a Russian-born court translator, Irina Malezhik. And today his wife, Julia Yakolev, 37, pled guilty to stealing Malezhik's identity. She faces a minimum of two years in jail when she is sentenced on May 6. Meanwhile, cops have been unable to find Malezhik's body. Last year they theorized Dmitry had strewn it, and possibly others, across Jersey. One source told the Post that Dmitry had a "lot of bodies on him ... The guy is a like a serial killer."