In 1992, Laura Houghteling disappeared from her Bethesda home and was never seen again. After five days, police found a bloody pillow and pillowcase lying in the woods not far from Laura's house. Laura's bedroom was then searched and police used Luminol, which reacts with the enzymes in blood. The police now had a prime suspect, her part-time gardener Hadden Clark. Amido black 10B was used to enhance the fingerprints found on the bloody pillowcase, which were matched to Clark. In 1993, Clark plea-bargained to a reduced charge of murder in the second degree.