It has been four months since Khloé Kardashian's $250,000 worth of jewelry was stolen at her home shared with Lamar Odom in Tarzana, California. It has recently been reported that her estranged husband is suspicious of the "Keeping Up With the Kardashians" clan.

Police sources told RadarOnline that the burglary investigation is still open and is "at a standstill, with no new leads." Since the reality star's family has not been aggressive in terms of tracking down the thief, and no arrests have been made, the NBA player apparently thinks one of them is responsible for the robbery. 

"Lamar doesn't think anyone close to him, or anyone he knows could have stolen the jewelry. He believes that the theft was orchestrated by a Kardashian family friend, or even a family member," the source said. "The locks had been changed to the house, and he had no access to the house at that time. There is a surveillance video and closed circuit security cameras all around their former residence. The thief knew the combination to Lamar's personal safe, and the location of it. It's also interesting that it was only Lamar's jewelry which was stolen, and not Khloé's."

The source then pointed out the fact that the 30-year-old has not been active of looking for the burglar.

"If one of Lamar's friends, assistant or alleged drug dealers were responsible for the theft, it would have been broadcast for the whole entire world," the source said. "Yet there hasn't been a peep from the cops of Khloé since it occurred, which is very odd. Lamar doesn't think Khloé was responsible for it, but there is a possibility she has an idea about who might have done it.

"Kris, Bruce, Kourtney and Kim all had keys. ... Lamar doesn't think it could be any of them, but there are a lot of people in and out of their own personal residences, so it's possible the key could have fallen into the wrong hands," the source said.

Although the theft happened in March, it came on a recent episode of "KUWTK," where Khloé Kardashian discovers that eights pieces of jewelry were missing, as well as the majority of Lamar Odom's.

"I feel disgusted. I want to know who took my f*cking sh*t," she said. "I'm not responsible one and I lose all his jewelry. I failed.

"I now have to question and look at the people that I love and that I let into my home differently. It's a very weird feeling," she said