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"&lt;img style=\"float: right; margin-left: 15px;\" src=\"http://ll-media.tmz.com/2010/04/23/0423-big-brother-wm-mug-ex-credit.jpg\" /&gt;A former \"&lt;strong&gt;Big Brother&lt;/strong&gt;\" houseguest was arrested this weekend after allegedly unleashing a ferocious attack on his pregnant girlfriend. &lt;br /&gt;&lt;br /&gt;According to the Boston PD, cops responded to the home of &lt;strong&gt;Matt McDonald&lt;/strong&gt; -- who appeared on &lt;strong&gt;BB Season 9&lt;/strong&gt; -- after his girlfriend showed up at a local police station to file a complaint.&lt;br /&gt;&lt;br /&gt;Cops say Matt's GF -- who's currently 8 weeks pregnant with Matt's baby -- told them the two began arguing after the reality star accused her of cheating on him ... and that's when things got violent. &lt;br /&gt;&lt;br /&gt;According to the police report, Matt's GF told cops he began strangling her and yelling, \"I hope the baby dies and hope u [sic] have a miscarriage.\"&lt;br /&gt;&lt;br /&gt;The GF claims the next day, Matt accused her of pouring water in his plasma TV -- and then proceeded to kick her in the collarbone, put her in a headlock ... and began punching her in the arms. &lt;br /&gt;&lt;br /&gt;During the alleged confrontation, Matt called the victim's father on the phone and she allegedly screamed for help. Matt then screamed, \"Shut the f*ck up or I'll punch you in the face.\" She also claims Matt threatened to kill her father if he called cops.&lt;br /&gt;&lt;br /&gt;According to the police report, officers observed visible bruising on the GF's arms, neck and collarbone -- and proceeded to arrest McDonald. According to the police report, McDonald told cops that she attacked him -- and he was simply defending himself. &lt;br /&gt;&lt;br /&gt;McDonald was charged with assault and battery -- and assault and battery upon a pregnant person. He's due back in court next month.&lt;br /&gt;&lt;br /&gt;As for the baby, we're told the GF is still pregnant. &lt;br /&gt;&lt;br /&gt;&lt;strong&gt;UPDATE: &lt;/strong&gt;TMZ has learned the two were engaged to be married at the time of the incident. &lt;br /&gt;&lt;br /&gt;&lt;!-- relatedlinks --&gt;&lt;a target=\"_blank\" href=\"http://photos.tmz.com/galleries/celebrity_mugshots#tab=most_recent\"&gt;&lt;img alt=\"0415_mugshots_300\" src=\"http://ll-media.tmz.com/2010/04/15/0415-mugshots-300.jpg\" /&gt;&lt;/a&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.tmz.com/2010/04/22/big-brother-matt-mcdonald-pregnant-woman-assault/2/>