BELLEVUE, Neb. -- The search for a Plattsmouth boy missing since January has been delayed.

Five cadaver dog teams and personnel from several police agencies had planned to comb a landfill Friday to search for evidence in the case of Brendan Gonzalez.

Cass County Attorney Nathan Cox said in a release Thursday night that Plattsmouth Police Chief Brian Paulsen reported there were mechanical problems at the landfill and the search would be delayed until Monday.

Teams plan to dig out a section of the landfill called phase seven. Officials said the area is the size of 6.5 football fields.

Experts are helping investigators narrow their search down even further to concentrate on an area measuring 75 feet by 125 feet.

Bellevue police are searching the landfill following a new lead in the case of missing 4-year-old Brendan Gonzalez.

Tuesday, an apartment resident told police he or she might have seen a body being put into a trash dumpster on the day Brendan disappeared. Police said Ivan Henk, Brendan's father, told them he put Brendan's body in a dumpster at the R Apartment complex in Bellevue near Offutt Air Force Base.

Bellevue police and Plattsmouth police searched the dumpster for evidence, before turning it over to the Douglas County forensic lab for more testing.

Bellevue Police Chief Hines Smith said the dumpster has been emptied several times since then at the Sarpy County landfill.

Bellevue Police Capt. Herb Evers said Wednesday that plans were finalized to search the Sarpy County landfill after Plattsmouth police and the Douglas County Crime Lab found blood and hair in the trash bin.

Evers said he has not heard if confirmation has been made on whether the blood or hair matched that of the boy.

Evers said his department has been asked to assist with manpower in the search of the landfill. He said cadaver dogs from Des Moines also are being brought in to assist in the search.

Henk said in court that he had killed Brendan, who's been missing since Jan. 6.

Look for more complete coverage of this story on KETV NewsWatch 7.

More Complete Coverage: Case Timeline:

• Jan 6: Henk leads police on high-speed chase. Brendan reported missing. Police begin searching for Brendan.
• Jan 7: More agencies and FBI join search teams. Police announce "substantial evidence" leads them to believe Brendan is probably dead.
• Jan 8: Search expands throughout Plattsmouth and surrounding area. Police announce they have narrowed suspects to three or four people, including Brendan's parents. Brendan's father, Ivan Hank, is charged for Monday's chase.
• Jan 9: One-hundred searchers head out early and don't find any clues. A fund has been set up for the family to handle expenses.
• Jan 10: Fifty searchers continue looking for Brendan, nothing is found. Investigators wait for test results on blood found in Henk's car and in a garage. Preliminary results are returned to police who then talk to Brendan's mother Friday night.
• Jan 11: Search crews continue to look for Brendan, find nothing.
• Jan 12: Police suspend the search for Brendan at 6 p.m.
• Jan 27-30: Police resume search for Brendan using specially trained search dogs. A reward of $8,000 is offered.
• March 4: Brendan's grandmother is ruled out as a suspect in the case.
• March 18: Ivan Henk pleads guilty to reckless driving and obstructing an officer charges
• April 25-28: Search for Brendan resumes, this time concentrating on a pond north of Plattsmouth, dive teams find nothing.
• April 29: Ivan Henk is in court to be sentenced on two charges not directly related to Brendan's death. Henk tells the court he killed Brendan.