The tale of Samuel Little is now widely know around the United States.

His name will go down in history dubbed, the most prolific serial killer.

Thursday, Little pleaded guilty to the 1994 murder of Denise Brother. He received a life sentence.

Following the hearing, we decided to take a deeper look into the psychology behind the confession.

“Once you have a life sentence, what do you have to lose? You might as well become the most prolific serial killer of all time,” said Dr, Rebecca Seifert Lynch, Clinical Psychologist with a forensic practice.

Dr. Seifert Lynch researched the FBI analysis of Little and offered her profession opinion on the case.

“I cant provide a specific diagnosis having not seen him but he has many traits of a clinical psychopath,” said Dr. Seifert Lynch.

Little confessed to more than 90 murders that span four decades. Currently 40 have been confirmed.

So why confess now? After getting away with murder for decades.

“Why wouldn’t he? If we are talking about someone who has many, at least traits of a psychopath being called one of the most prolific serial killers of all time, that’s a badge of honor. Especially since he was caught so few times doing what seemed to be a very consistent pattern for him,” said Dr. Seifert Lynch.

You may say Little was sporting his badge of honor leaving court Thursday. 

Little was smiling after receiving his fourth guilty plea and sentenced to a fourth life sentence.

“Murder became what seemed to be his addiction over time. So the more that he moved the more difficult it was to catch him and he knew that so on some level, hes very intelligent,”  said Dr. Seifert Lynch.

Littles ‘addiction’ holds a lot of details, details he hasn’t forgotten decades later.

According to Texas Rangers, Little can recall, locations, names, age, where he dumped the body and even draw pictures of his victims.

“Look back at some of the best days of your life, look at birthdays, look at special occasions. Can you remember what your wearing? what the air smelt like? The things around you. These were his best days so yes I strongly believe that he remembers these things because this was such an emotionally grained piece of time for him,”  said Dr. Seifert Lynch.

Little’s trial in Odessa wrapped up Thursday.

He is heading back to California to serve out the life sentences there.