August 25, 2015 |
When Kareem Johnson killed Walter Smith outside a North Philadelphia nightclub, prosecutors said, he shot him at such close range that Smith's blood splashed onto Johnson's red Air Jordan baseball cap. That cap helped convict him. "That hat that was left at the scene in the middle of the street has Kareem Johnson's sweat on it and has Walter Smith's blood on it," Assistant District Attorney Michael Barry told jurors. "DNA is a witness. It is a silent, unflappable witness. " But he was wrong.
July 23, 2015 |
Officials from West Chester - both the university and the borough - are betting on something scientific to help ward off the divisions that have separated communities grappling with the resurgent issue of race. They are looking to DNA. In a new initiative called "One University, One Ancestry," the school will offer DNA testing to students, staff, faculty, and community members. They hope it will not only give participants insight into the origins of their ancestors, but awaken them to shared experiences and backgrounds revealed by a closer look at the gene pool.
July 16, 2015 |
For centuries, dog lovers have been asking their pooches to sit and stay. These days, more owners are adding: Who's your daddy? The increasing options to administer DNA tests for dogs (and to a lesser extent, cats) answers the call of curiosity, sure, but the tests that reveal your mutt's family tree also can help vets better diagnose disease and manage lifestyle issues like exercise, diet, and behavior problems. At the very least, the tests - now more accurate than the ones first introduced to consumers about eight years ago - allow owners to know how big the dog they adopted at six months likely will be at six years.
February 8, 2015 |
An expert medical panel has endorsed using a DNA test as an alternative, not just an add-on, to the venerable Pap smear for cervical cancer screening. But the American College of Obstetricians and Gynecologists, which had a representative on the panel, says the new screening approach is premature. The ob/guns' group continues to recommend either Pap smears or "co-testing" using the Pap and DNA tests. The DNA test, called cobas and made by Roche, detects two strains of the human papillomavirus (HPV)
January 1, 2015 |
The investigation into a series of rapes in Pennypack Park was years old, and still open, when a man named Robert Palen was arrested in Wisconsin late last year. The 38-year-old, born and raised in Philadelphia, had lived near the park, where three women said they had been abducted, beaten, and raped by a man driving a white work van, in 2010 and 2011. But DNA evidence - found in just one of the cases - never turned up a match, and the trail had grown cold by December 2013, when Palen was arrested and accused of beating, strangling, and raping a Madison, Wis., woman in her home.
November 25, 2014 |
Peter H. Sellers, 84, of Philadelphia, one of the early pioneers of DNA research, died Saturday, Nov. 15, of cancer at home. Dr. Sellers was the ninth generation of Philadelphia's first family of scientists and engineers, according to D. Vitiello, writing in Engineering Philadelphia, published by Cornell University Press in 2014. Beginning in 1966, Dr. Sellers spent 48 years as a senior research scientist at Rockefeller University. The university called him "a brilliant and pioneering mathematician whose [work]
November 12, 2014 |
A Bucks County man has been charged with arson and vandalism for allegedly burning American flags, veterans' flag holders, and other gravesite decorations at two cemeteries in August and September, according to police. Anthony Davis Carter, 29, of Feasterville, is accused of collecting the items at gravesites, tossing them into a pile, then setting them ablaze. Police say he did it five times in about a month, at Roosevelt Memorial Park and Rosedale Memorial Park, and that the acts left some gravemarkers damaged as well.
September 28, 2014 |
A "Jeopardy" answer: The word for the plastic tip of a shoelace. Question: What is an aglet? A medical jeopardy answer: The word for the DNA at the ends of chromosomes. Question: What is telomere? In my office at St. Christopher's Hospital for Children last month, I saw a small 9-year-old boy for a checkup before fourth grade. His single mother was concerned that a child was repeatedly bullying him at school.
September 21, 2014 |
The Philadelphia District Attorney's Office announced Friday that it had agreed to a new trial for Anthony Wright, now serving life in prison for the 1991 rape and murder of a 77-year-old Nicetown woman. "We are committed in the District Attorney's Office to giving everyone a fair trial," said Assistant District Attorney Mark Gilson, a veteran homicide prosecutor who in April was named head of the office's new Conviction Review Unit. Gilson said new DNA analysis techniques, which show that Wright's DNA was not on the body of Louise Talley, were "not available when we tried the case in 1993.