From teen victims Libby German and Abby Williams to Alonzo Brooks to the 'Jennings 8' and more, we look at some murder cases that investigators could use the public's help in solving.

What makes a murderer choose one killing method over another? We spoke with experts to gain insight into murder weapon preferences and what they mean.

Dr. Thomas Noguchi, Los Angeles' 'coroner to the stars,' investigated celeb deaths like Marilyn Monroe and Sharon Tate. Known for detailed autopsies and media flair, he pioneered linking forensics to profiling, often clashing with police and critics.

We speak with author Jaime Gehring about her experience growing up in remote Montana woods next to Ted Kaczynski, who killed three people and injured 23 others between 1978 and 1995.

Rita Smith, a renowned domestic violence expert and advocate, talks about some red flags that indicate an abusive partner may be homicidal.

Reginald Reed Jr. on the aftermath of the murder of his mother, Selonia Reed, and 35 years later, his father Reginald Reed Sr.'s conviction in the case.