A 23-year-old medical student pleaded not guilty Monday to an indictment alleging first-degree murder charge in a killing tied to Craigslist.

Even though Megan McAllister is stilling standing behind fiancee and alleged murderer Philip Markoff, it appears the wedding could be off.

The fiancee of a Boston medical school student accused of fatally shooting a woman who placed an ad on Craigslist says there’s no way he could have done it.