Wife, children of fallen USCP officer William ‘Billy’ Evans mourn loss at U.S. Capitol Rotunda

The wife and children of fallen U.S. Capitol Police Officer William "Billy" Evans were seen Tuesday mourning the loss of their husband and father as Evans laid in honor at the U.S. Capitol Rotunda.

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Evans' son can be seen in a video of the memorial wearing what appears to be his late father's police hat in his memory.

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VIDEO: Son of fallen Capitol Police Officer William Billy Evans seen wearing police hat

The son of the late William Billy Evans, who was killed when a vehicle rammed into him and another officer at a barricade near the U.S. Capitol in April, can be seen in a video of the memorial wearing what appears to be his late father's police hat in his memory as Evans lies in honor at the U.S. Capitol Rotunda.

Evans' daughter can be seen wiping tears from her mother's eyes as the family pays their respects.

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VIDEO: Daughter of fallen USCP officer William Billy Evans wipes tears from mother’s eyes

The daughter of the late William Billy Evans, who was killed when a vehicle rammed into him and another officer at a barricade near the U.S. Capitol in April, can be seen in a video of the memorial wiping tears from her mother's eyes as Evans lies in honor at the U.S. Capitol Rotunda.

President Joe Biden, who spoke at the memorial on Tuesday, can be seen in video of the service picking up a toy for Evans' daughter and returning it to her after she dropped it. House Speaker Nancy Pelosi acknowledges the sweet exchange as she delivers remarks saying, "Greater compliment does no one have than the President of the United States looking after your toys."

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President Biden picks up toy for daughter of fallen USCP officer

President Biden is seen picking up a dropped toy for the daughter of fallen USCP officer William Billy Evans at his memorial service as he lies in honor at the U.S. Capitol Rotunda.

41-year-old Evans was killed in the line of duty on April 2 when a vehicle rammed into him and another officer at a barricade near the U.S. Capitol. The driver of the vehicle, 25-year-old Noah Green, was armed with a knife and was shot to death by police during the incident, officials said. The investigation into the attack is still ongoing.

READ MORE: DC medical examiner releases cause of death for Capitol officer killed in ramming attack

Evans’ casket was carried into the Rotunda around 11 a.m. Tuesday. President Joe Biden, Senate Majority Leader Chuck Schumer, D-N.Y., House Speaker Nancy Pelosi, D-Calif., family, other congressional leaders paid their respects to Evans in the Rotunda.

READ MORE: "Their dad was their hero": Family of fallen USCP Officer Billy Evans releases statement

"Billy was the best father, son, brother, and friend anyone could ever hope for. His death has left a gaping void in our lives that will never be filled," his family said in a statement released through the U.S. Capitol Police in the days following his death. He was an 18-year U.S. Capitol Police veteran and a father of two who grew up in North Adams, Massachusetts.