MALIBU (CBSLA) — The remains of a young mountain lion who made the news earlier this year for peering through the door of a Westlake Village home have been found, according to the National Park Service.

(credit: National Park Service)

P-55 was estimated to be just three years old, but biologists say he had already crossed the busy 101 Freeway twice – first heading north, then crossing to go back south of the freeway.

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The lion, whose cause of death is not known, was found in the central Santa Monica Mountains, in the hills above Malibu, National Park Service Ranger Kate Kuykendall said. P-55’s collar had failed to signal his death, and by the time biologists found his remains, they were already too decomposed to make a determination.

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P-55 seemed to be healthy, Kuykendall said, so it’s possible he died of rodenticide poisoning or fought with another male lion, although there are no signs of a struggle where the lion’s remains were found.

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The lion was photographed in February by a Westlake Village mother, whose son spotted P-55 peering in through their sliding glass door. He generally roamed the northwest end of the Santa Monica Mountains, west of Las Virgines Road and north of Mulholland.

(credit: Nadine Young)