CHARLES CO., Md. (WJZ) — Authorities say a 33-year-old man killed his 3-year-old daughter before turning the gun on himself Sunday evening.

According to the Charles County Sheriff’s Office, Brian Duncan Davis and Maddie Sabre Davis were found dead inside a pickup truck at Gilbert Run Park in La Plata, just after 7:30 p.m.

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The investigation found that Brian had court-ordered visitation rights with Maddie, and was supposed to return her earlier on Sunday.

When he didn’t return his daughter on time, family members began searching for them.

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They later found his truck at the park, and called police.

Authorities did recover a handgun inside the truck.

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