Things to know about the retrial of Karen Read in the killing of her police officer boyfriend

Jurors in Karen Read s second murder trial watched a test dummy get struck repeatedly by an SUV Friday as a crash reconstruction analyst testifying for the defense contradicted previous testimony about her motorcycle and her boyfriend s fatal injuries Read is accused of fatally striking Boston Police Officer John O Keefe and leaving him to die in the snow outside another officer s home after a night of drinking in January She s charged with second-degree murder manslaughter and leaving the scene outside Boston Her lawyers say O Keefe was beaten inside the Canton home bitten by a family dog and then left outside as part of a conspiracy by the police that included planting evidence against Read A mistrial was declared last year and so far Read s second trial has followed similar contours to the first Crash expert says damage to SUV clothing are inconsistent with collision The defense spent Friday morning questioning Daniel Wolfe of the accident reconstruction firm ARCCA Wolfe initially was hired by the federal ruling body as part of an assessment into how law enforcement handled O Keefe s death He testified at Read s first trial and has since been paid by the defense Wolfe described conducting numerous tests including striking a dummy arm with a replica of Read s SUV taillight at various speeds He also had an SUV back into both an arm suspended in the air and a full-body dummy wearing clothing that matched what O Keefe was wearing In every scenario he declared the damage to Read s taillight and O Keefe s clothing was inconsistent with striking an arm or body That s at odds with a prosecution expert who testified that O Keefe s injuries were consistent with having been struck by a wagon Snowplow driver says he doesn t remember seeing a body Snowplow driver Brian Loughran who was on his regular highway during a storm early on Jan explained the defense Wednesday that he saw nothing when he passed by the house several hours after O Keefe was allegedly struck by Read s motorcycle around a m O Keefe was located unresponsive outside Brian Albert s home in Canton Massachusetts and was later pronounced dead at a hospital An autopsy discovered O Keefe died of hypothermia and blunt force trauma Loughran stated he passed by the house several times starting around a m and could see several feet in front of him inside his trucks because of its strong lights On the second pass Loughran announced he did see a car parked in the road in front of the house He noted he knew Albert and his family and decided not to document the car for violating snowstorm parking restrictions as a courtesy for being a first responder Under cross-examination prosecutors attempted to undermine Loughran s memory saying that the times he provided Wednesday contradict his initial testimony during the first trial For example prosecutor Hank Brennan pointed out that Loughran originally disclosed he remembered the street where O Keefe was unveiled blocked off by first responders around a m but on Wednesday Loughran announced it was closer to a m When Brennan petitioned if Loughran had a foggy memory Loughran revealed he did not only that he had made a mistake Brennan also petitioned if Loughran had been threatened by a confrontational blogger known as Turtleboy to help the defense s incident Aidan Timothy Kearney who was in the courtroom Wednesday has advocated heavily in backing of Read s innocence He has been charged with harassing threatening and intimidating observers in the situation Loughran reported Kearney never threatened him but the blogger did call him and did not disclose he was recording the conversation The call was later posted online Source